Carrier VoIP Nortel MG 9000 Fundamentals

Release: (I)AG11 Document Revision: 11.02

www.nortel.com

NN10011-111 .

Carrier VoIP Release: (I)AG11 Publication: NN10011-111 Document status: Standard Document release date: 4 July 2008

Copyright © 2007, 2008 Nortel Networks All Rights Reserved.

Sourced in Canada, the United States of America, and the United Kingdom

LEGAL NOTICE

While the information in this document is believed to be accurate and reliable, except as otherwise expressly agreed to in writing NORTEL PROVIDES THIS DOCUMENT "AS IS" WITHOUT WARRANTY OR CONDITION OF ANY KIND, EITHER EXPRESS OR IMPLIED. The information and/or products described in this document are subject to change without notice.

Nortel, the Nortel logo, Business Made Simple and the Globemark are trademarks of Nortel.

All other trademarks are the property of their respective owners.

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3 .ContentsNew in this release 5

Features 5 Other changes 5

Functional description 7 MG 9000 applications 8 Switched lines 9 Private lines 9 DSL 10 Service module types 11

Voice 11 Integrated voice and data service 12 Network interfaces 12 Emergency stand alone 13

Internodal ESA 16 ESA MLPP 17 Hardware 18

NTNY01BB MG 9000 frame 18 NTNY03AA outside plant cabinet with MG 9000 shelves 19 MG 9000 shelf description 23 Shelves 23 Common cards 33 Common control cards 36 Line/service card: ITX card 56 Line/service cards: switched lines cards 61 Line/service cards: private lines cards 77 Line/service cards: DSL 77 Additional ringing information 79 Circuit card indicators 81 Description of tools and utilities 81 Software 81

Software loads 81 Upgrade and patch system 83 OAMP strategy 83

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Card OAMP 84 ATM OAMP 84 Carrier OAMP 85 Interfaces 85

Network interfaces and protocols 85 User interfaces 86

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5 .New in this release

The following sections detail what’s new in Nortel MG 9000 Fundamentals (NN10011-111) for release (I)AG11:

“Features” (page 5)

“Other changes” (page 5)

Features

There were no feature changes made to this document.

Other changesThere were no other changes made to this document.

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6 New in this release

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7 .Functional description

The Nortel Media Gateway 9000 (MG 9000) is an access gateway positioned at the edge of the network, offering a wide range of voice, data, and video services with direct accessibility to the asynchronous transfer mode (ATM) network.

The MG 9000 is a multi-service media gateway that enables leading edge services and transitions revenue-generating voice services into the packet access domain. The MG 9000

provides a single access platform for multiple services. This is accomplished by combining voice and data services into a single gateway, with a single network interface and single management infrastructure.

has up to 16 service slots in each shelf

connects subscriber interfaces directly to backbone networks

supports the following data connections and services in the master shelf: full-rate asymmetrical digital subscriber loop (ADSL) digital signal level-0 (DS-0) Specials DS1 Private Lines (DS1 cards are not used in the Universal Access

- Internet Protocol [UA-IP] solution.) The private lines application is not supported on an MG 9000 in an IP solution.

supports emergency stand alone (ESA)

supports Internodal ESA (assignment to an ESA community of interest [COI]) when the MG 9000 is connected to a LAN switch (Multiservice Switch 15000 or equivalent)

supports up to four XPMs (ESMA/LGCI) through four pairs of DS-512 cards

deploys in the following solutions: UA-AAL1 - The Universal Access-AAL1 (UA-AAL1) solution is

a multi-service ATM network solution. The UA-AAL1 solution

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8 Functional description

provides voice, DSL, and private lines services over a unified ATM network in the North American market. The UA-AAL1 solution uses the ATM transport network to carry packetized voice, call control signaling, OAM and data traffic. UA-IP - The Universal Access IP (UA-IP) solution provides an

end office capability featuring plain old telephone service (POTS), P-Phone, and Coin lines services, trunking services, and DSL services in International and North American markets. The UA-IP solution uses the IP network to carry packetized voice, call control signaling, OAM and data traffic.

The MG 9000 contains a master shelf configuration for the switched lines application, which contains the common equipment cards for the node. This is the first MG 9000 shelf in the node (typically the bottom shelf in the frame). Additional shelves in the node are subtended from the master shelf by use of connections through the Internet telephony processor (ITP) card and Internet telephony extender (ITX) card.

For multiple shelves in the frame using the private lines application, each MG 9000 is considered a standalone shelf. Each shelf has its own connection to the ATM backbone. For mixed services, the master shelf contains the private lines application cards and the common equipment cards for the DSL and switched lines applications. Mixed shelves are provisioned according to private lines standards. Additional shelves in the node are subtended off the master shelf.

The MG 9000 is used as a single or multiple shelf node depending on the customer line capacity requirements. The term node is used to describe a MG 9000 network element connected to an ATM or IP network.

The MG 9000 supports three applications:

private lines over ATM

switched lines

DSL

MG 9000 applications

Each of these applications can reside in the same shelf or in different shelves. There is no physical difference between the shelves used for the private lines and switched lines applications. A single shelf can be provisioned to provide private lines and switched lines applications.

The type and number of individual circuits are limited by the hardware restrictions for each application.

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Private linesThe MG 9000 is a scalable platform that supports DS1 private line

subscriber interfaces over an OC-3 or DS1-IMA network interface. Private lines are persistent DS1 or DS0 connections that are provisioned by the operating company as persistent connections to the subscriber.

The private lines application is not supported on an MG 9000 in the UA-IP solution.

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Private lines 9

Switched lines

The MG 9000 is a scalable platform providing tip and ring subscriber interfaces and redundant OC-3/STM-1 or DS1 IMA interfaces to the Succession Network.

Switched lines services include wireline access on the MG 9000 and the services required to support the lines. The switched lines application brings narrowband voice services onto the Succession Network and acts as a switch replacement.

Support for legacy XMS-based peripheral modules (XPM) is provided using access bridging interface (ABI) over DS-512 card. Broadcast loading/patching is not supported on XPMs hosted by the MG 9000 ABI cards. XPMs and subscriber lines connected to XPMs that are subtended from the MG 9000 over DS-512 links are not managed by the MG 9000. A list of supported XPMs is provided in the Table 1 "MG 9000 voice cards" (page 11) table under DS-512.

The following diagram is an illustration of the switched lines application.

Figure 1 Switched lines application

10 Functional description

The following diagram is an illustration of the private lines application.

Figure 2 Private lines application

DSL

Digital subscriber line (DSL) services transmit two separate data streams with greater bandwidth devoted to the downstream (subscriber) than the upstream. DSL lines can be provisioned on the same shelf with switched lines and private lines. The 8+8 ADSL card supports DSL lines and terminates eight fully compliant ADSL subscriber loop pairs for analog voice telephone service and standard compliant ADSL data services. DSL cards supporting asymmetric DSL (ADSL) data services are provisioned only in the master shelf. The following diagram is an illustration of the DSL application.

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Service module types

This section describes the service module types for the MG 9000.

Voice

The following table lists the cards for the MG 9000 voice service.

Table 1 MG 9000 voice cards

Card Description/function Application

POTS 32 Traditional telephone service card with 32 ports. UA-AAL1 and UA-IP

solutions

GLC 32 Global line card with 32 ports. UA-AAL1 and UA-IP

solutions

GLC 12 Global line card with 12 ports and Coin Line Resource

(CLR) services.

UA-AAL1 and UA-IP solutions

SAA-12 12-port service adaptive access line card that support

2-wire services. Example: POTS, P-phone, loop-reversal, and North American Coin (requiring 100 V generator for coin return).

UA-AAL1 and UA-IP solutions

DS1 16 16-port DS1 line card that support private and leased line

service over a circuit emulation service (CES) function.

UA-AAL1 solution only

DS-512 Up to four legacy XPMs are supported off the MG 9000

through up to four pairs of DS-512 cards in the master shelf (one pair/XPM). The following legacy XPMs are supported:

ESMA, SMS, and SMS-R (Mode 1, 2, & 3)

LGC, LGCI, LTC, LTCI (supporting the following subtending peripherals: LCM, RLCM, LCME, RSC, Dual RSC and RSC-S, OPM, OPAC, RLCM, and Star

UA-AAL1 and UA-IP solutions

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Service module types 11

Figure 3 DSL application

12 Functional description

Table 1 MG 9000 voice cards (cont’d.)

Card Description/function Application

Hub), and the Subscriber Module Urban (SMU) and its subtending Remote Concentrator Urban (RCU) DS-512 cards are not provisionable in an MG 9000 with DS1-IMA interface cards.

The following limitations apply to ABI SMU support.

ABI SMU does not support Line Digit Trunk Public Safety Answering Point (LDT PSAP).

ABI SMU does not support Remote Maintenance Modules (RMM). Conduct line testing on the RCUs by using the RMM subtended from an ABI LTC/LGC or an ABI SMA2.

MG 9000 Emergency Stand-alone (ESA) feature supports ABI SMU but not ISDN functions while in the ESA state. ISDN is not supported on any ABI XPM while the MG 9000 is in the ESA state. The SMU supports P-Phones by using the D-channels provided by the ISDN signaling processor (ISP) and the D-channel handler (DCH) cards. Because the MG 9000 ESA feature does not support ISDN, the SMU does not support P-Phones when the MG 9000 is in the ESA state.

ABI SMU operates only with the UA-IP solution, not the UA-AAL1 solution.

Integrated voice and data service

The following table lists the cards for the MG 9000 integrated voice and data service.

Table 2 MG 9000 integrated voice and data cards:

Card Description/function Application

ADSL 8+8 ADSL card with 8 full-rate data ports (software selectable)

and 8 POTS ports.

UA-AAL1 and UA-IP solutions (not supported on MG 9000 with GigE DCC cards)

Network interfaces

The following table lists the network interfaces for the MG 9000.

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Emergency stand alone 13

Table 3 MG 9000 network interfaces

Interface Description/function

OC-3c (UA-AAL1 solution or UA-IP solution)

or

Optical network interface with a base transmission rate of 155.52 Mbps, used on data control card for voice and data. The OC3 carrier can be configured as concatenated or channelized. If channelized, the OC3 carrier is divided into three STS-1 channelized carriers with a DS3 payload.

STM-1c (SDH) (UA-IP solution)

SONET digital hierarchy (SDH) base transmission rate of 155.52 Mbps, known as synchronous transport module 1 (STM-1), used on data control card for voice and data.

Gigabit Ethernet (GigE) Gigabit links connect to IP network and use virtual local area

networks (VLAN) to segregate IP traffic into bearer, call processing signaling, OAM signaling, and link integrity signaling paths.

DS1 IMA Uses T-1 lines to perform inverse multiplexing over ATM (IMA). The data stream splits across one or more DS1 circuits by the MG 9000 data control card (DCC), which has IMA, and is reassembled at the remote. DS1 IMA is used when the MG 9000 is located at a remote site. (DS1-IMA does not support DS-512 interface cards.)

Emergency stand alone

Emergency stand alone (ESA) in the MG 9000 supports basic calls within the MG 9000 while one or more of the virtual media gateways (VMG) in the MG 9000 are out of communication with its assigned Gateway Controller (GWC). ESA also provides basic emergency service access (such as 911, 411, and 611).

For the UA-AAL1 solution, 7 digit and 10 digit dialing plan lengths are supported while in ESA mode. For the UA-IP solution, 6 to 13 digit dialing plan lengths are supported.

ESA is supported on ABI VMGs as well as ITP VMGs. However, ABI VMGs only support Enhanced ESA, meaning ESA data is used from the Core. In addition, ESA on ABI VMGs currently does not support warm exit.

If the Core loses connectivity with the ABI VMG for more than 25 seconds, the VMG and hence the XPM, enters ESA. The XPM becomes System Busy (SysB). Calls warm enter ESA, however ESA warm exit on ABI is not supported and calls drop when the Core completes the restart and resumes connectivity with the ABI and the XPM.

The following table lists the ESA capabilities available on the MG 9000.

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14 Functional description

Table 4 ESA capabilities by solution

Supported?

ESA capability

North American

Inter- national

Inter- national

Warm entry - calls in a stable state stay up, if the bearer path is not cut, and will tear down gracefully.

Yes Yes

Warm exit for POTS, P-Phone, Coin, and IBN lines - enables calls that were active (in a talking state) in ESA mode to survive exit and continue to be managed by call control until the call completes. Not supported for ABI VMGs.

Yes Yes

Inter-ITP/VMG ESA - calls between ITP shelves that are in ESA on the same MG 9000.

Yes Yes

7 digit dialing - any subscriber on an MG 9000 must be able to dial a 7 digit number to reach any other subscriber in the same HNPA on the same MG 9000.

Yes Yes

10 digit dialing - ability to support multiple HNPAs on a single MG 9000, as a requirement for future trunk support.

Yes Yes

Variable length dialing - ability to support 6 or 8 digit DNs per market dialing plan.

Yes Yes

Coin lines supported in ESA, with no coin collection. Yes No

911, 411, 611 dialing - service codes translate to a DN per ITP. Yes Yes

Multiple appearance directory number (MADN) lines - if a user dials a MADN number, the (ESA) call will terminate to a member if one is available. Also, only this available member will ring in the ESA call. In non-ESA mode, all MADN members will ring.

Yes Yes

Basic call processing on P-Phone lines in ESA only, primary DN only

the primary DN, Hold, RLS, and digit keys are the only recognized keys supported for P-Phones

the handset and hands-free operation is supported for P-Phones

Yes No

Simultaneous 7/10 digit dialing Yes Yes

Multi-length dialing plans available No Yes

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Table 4 ESA capabilities by solution (cont’d.)

Supported?

ESA capability

North American

Inter- national

Inter- national

Support for hunt groups - multi-line (MLH), Distributed Line (DLH) and Directory Number Hunt (DNH) hunt groups. All hunt groups are treated as MLH hunt groups, meaning the hunt group can only be accessed by dialing the pilot DN. Hunting, however, is nonlinear among the VMGs that are in ESA. The call may be terminated to any available member in the group regardless if the group is split across VMGs. A hunt group divided across several VMGs cannot guarantee true linear hunting for the group. The H selector in table ESAPXLA for a hunt group, the sequence number to indicate which hunt group member to start hunting from, is not supported.

Circular hunting (CIR) is not supported.

Yes Yes

Centrex extension dialing in ESA

The dialing plan allows

The ability to dial members of the same customer group through a Core datafilled extension numbering plan (Centrex extension dialing) is supported.

Customer group support - 3-5 digit extension dialing, IBN restricted dialing, per customer group emergency numbers

Yes No

7-digit, 10-digit, or 7-digit and 10 digit simultaneous dialing. Yes No

The ESAPXLA table in the Core should be provisioned with the emergency service numbers (such as 911) needed while in ESA. Since each VMG can independently drop into ESA, it is recommended that each VMG (as represented by an LGRP in the Core) represented in the ESAPXLA table be provided with its own emergency service translation and a local terminating DN.

Emergency service translations are supported, but not emergency service features.

Yes Yes

Automatic line support - when an automatic line goes off hook, a call is automatically made to a predetermined datafilled directory number.

Yes Yes

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16 Functional description

Internodal ESA

Internodal ESA provides the ability to make calls while in ESA between MG 9000 network elements. This means the operating company can provision a community of interest (COI) which defines the MG 9000 network elements can make ESA calls between one another. A community must have access to a LAN switch (Multiservice Switch 15000, or equivalent) for Internodal ESA calls to complete.

If an MG 9000 does not have access to a LAN switch, the MG 9000 will operate in ESA by routing calls between VMGs within the MG 9000 network element. In addition, though a COI is defined, each network element must be in ESA for it to participate in the community. Network elements are not forced into ESA.

The following information applies to internodal ESA:

up to 32 COIs can be defined for a network

up to 15 nodes can be members of a COI

a network element can only belong to one COI

the PVR (Multiservice Switch 15000) must be configured through the MG 9000 Manager for internodal ESA to function

The internodal ESA COIs and PVR are provisioned through the MG 9000 Manager. Refer to Nortel MG 9000 Configuration (NN10096-511). The following figure shows a functional diagram of internodal ESA with MG 9000 network elements assigned to a community of interest.

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Figure 4 Internodal ESA functional diagram

ESA MLPP

ESA Multiple Level Precedence and Preemption (MLPP) is supported when the MG 9000 is in Enhanced ESA. MLPP interworks with the supported Enhanced ESA line services feature set across all nodes including Internodal ESA, AUL, Hunt Groups, and MADN.

MLPP on MG 9000 requires that two attributes be provisioned, the precedence level of the line and if the line can be preempted. This data is sent from the Core to the MG 9000 Manager and cannot be modified from the MG 9000 Manager. The attributes can be set only on a switch supporting MLPP provisioning and any values and GUI views relating to MLPP are only visible in MLPP offices.

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18 Functional description

Hardware NTNY01BB MG 9000 frame

This section describes the frame for the MG 9000. The frame available for the MG 9000 is the NTNY01BB MG 9000 frame.

The following figure shows an NTNY01BB frame configuration.

Figure 5 NTNY01BB frame

The following table lists the frame components for the NTNY01BB frame.

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Hardware 19

Table 5 NTNY01BB frame: components

Frame components Description

IBIP Intelligent bay interface panel

DCC, ITP, and ITX card Data control card, Internet telephony

processor card, and Internet telephony extender card (up to four sets)

Cooling units 2

MG 9000 shelves 4

for POTS/combination lines

supports the following applications:

— Private lines

— Switched lines

— xDSL services (in master shelf

only)

— DS-512 (four pairs of cards) connection for up to four subtending XPMs (in master shelf only) The services available for the NTNY01BB frame include

up to 2016 lines in subtended frames

up to 1952 POTS lines in the first frame (or exchange for DSL, DS1, or ITX for future growth)

NTNY03AA outside plant cabinet with MG 9000 shelves

The MG 9000 can be deployed in an outside plant cabinet configuration. The NTNY03AA cabinet is an environmentally controlled cabinet that allows the MG 9000 to be located remotely. The outside plant cabinet connects to the network through fiber (OC-3) or copper connections (DS1-IMA T1/E1), or through other customer provided devices. Two MG 9000 shelves are installed in the OPC and support the services noted in the components table. In addition, various optional equipment can be included in the OPC to support.

The following figure shows the outside plant cabinet.

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20 Functional description

Figure 6 NTNY03AA outside plant cabinet

The cabinet is comprised of three compartments:

equipment compartment - contains two frames, a fixed frame in the front and a swing frame in the rear. Each frame is accessible from a door. The front fixed frame includes the MG 9000 and all required equipment such as, IBIP, fan tray, fuse panel, and rectifier shelf. The rear swing frame contains optional equipment.

service access compartment (SAC) - accommodates up to 18x100-pair service protection center (SPC) blocks. The SAC also houses the AC entrance box, the emergency generator outlet, and the battery disconnect panel. Approximately 1000 VF MG 9000 lines will be protected. The remaining block can be used for customer-required

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Hardware 21

lines. The connection between subscriber lines and the MG 9000 is through 3M MS2 25-pair connectors.

battery compartment - houses up to three strings of 155 A-Hr batteries for a total battery backup capacity of 465 A-Hr. The compartment is accessible through two panels underneath the equipment compartment doors. Forced ventilation is also provided by a set of fans that exhaust out the compartment on the side opposite the SAC compartment. The battery compartment is passively vented through slots in the removable panels to prevent the buildup of hydrogen gases. The batteries are front-accessible and are housed on top of a battery tray, with battery heater pads available as a option.

Power and communications cabling is routed through holes in the floor of the SAC compartment. Routing of cables to the equipment compartment can be made directly through the SAC equipment wall or through the battery compartment and the equipment floor.

The cabinet is of double-walled construction, having a 1-inch air gap for insulation purposes. The following components are used to control the environment of the cabinet:

fan shelf - one is required with the MG 9000 shelves. The fan shelf has 8 fans. The fan shelf provides a fan fail alarm. An additional customer-provided fan can be provisioned in the rear swing frame as required for customer-provided equipment.

heat exchanger - this is an air/air counter flow heat exchanger mounted on the front door, inside the cabinet designed to remove heat from the cabinet.

optional battery heater pads - when the cabinet is deployed in a region with low temperature extremes (less than 0 C for an extended period of time), an AC powered heater pad is available. The heater pad is thermostatically controlled and activates at 40 F (4.4 C) and deactivates at 60 F (14.5 C)

The following table lists the components for the NTNY03AA outside plant cabinet.

Table 6 NTNY03AA outside plant cabinet: components

Frame components Description

IBIP Intelligent bay interface panel

LCAP Local craft access panel

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22 Functional description

Table 6 NTNY03AA outside plant cabinet: components (cont’d.)

Frame components Description

DCC, ITP, and ITX card Data control card, Internet telephony

processor card, and Internet telephony extender card (up to two sets)

Fuse panel The fuse panel supports up to eight 0-50 A TPA fuses and up to 20 0-15 A GMT fuses for distribution of dc power to equipment and batteries. MG 9000 shelves 2

for POTS/combination lines

supports the following applications:

— Switched lines

— xDSL services (in master shelf

only)

NTM906MA Fan Tray

Yukon Power SystemTM rectifier shelf

48 V power rectifier - delivers up to 145 A of redundant dc current at -54.5 V. The unit has an integrated controller, dc distribution, and low voltage disconnect (LVD).

The LVD protects the batteries from complete discharge if the rectifier modules become unable to supply load power.

AC protection block This is an AC entrance box which includes:

main entrance breaker rated at 50 A

optional emergency input breaker rated at 50 A

main/emergency breaker selector mechanism

two breakers rated at 25 A to supply the rectifier shelf

one breaker rated at 15 A to supply the optional battery heater pad

one GFCI outlet rated at 15 A

integrated surge protection The services available for the NTNY03AA frame includes up to 928 POTS lines.

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Hardware 23

The following table lists the optional components for the NTNY03AA outside plant cabinet. For information, maintenance, configuration, and troubleshooting refer to the documentation provided with the optional equipment.

Table 7 NTNY03AA outside plant cabinet: optional components

Optional components Description Purpose

NTNY03EC Telect pin field For a copper-fed system. Provides demarcation

point for MG 9000 lines.

NTNY03JC Siecor Fiber Tray For a fiber-fed system. Provides demarcation

point for MG 9000 lines.

Up to 3 strings of batteries (NTNY03BA or NTNY03BB)

Fiamm 155 A/Hr batteries (NTNY03BA) orGNB 155 A/Hr batteries (NTNY03BB)

Provide a backup time of up to 8 hours under the following traffic and load conditions:

Provide a backup time of up to 8 hours under the following traffic and load conditions:

928 switched lines (8 CCS)

NTM906MA Fan Tray Optional fan tray for rear swing frame

equipment.

MG 9000 shelf description

This section provides the physical descriptions of the shelf configurations associated with the MG 9000.

The MG 9000 shelves are provisioned from the bottom shelf up, starting with shelf MG9K00 and proceeding to shelf MG9K03. Frames with less than four shelves require plenums in the empty shelf spaces to maintain proper airflow for cooling purposes.

The bottom shelf (first shelf) in the frame of an initial MG 9000 is considered the master shelf for the node. An MG 9000 frame supports a maximum of four switched lines shelves.

Refer to the figure titled Figure 5 "NTNY01BB frame" (page 18) to view the configuration of the frame.

ShelvesThis section describes the following shelves in the MG 9000 frame.

Table 8 MG 9000 shelves

PEC Description

NTNY11AA MG 9000 shelf

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24 Functional description

Table 8 MG 9000 shelves (cont’d.)

PEC Description

NTNY15AA Air filter assembly

NTNY17BA MG 9000 Intelligent Bay Interface Panel shelf

NTNY18AA MG 9000 Cooling Unit shelf with NTNY16AA Local craft

access panel (LCAP) (middle cooling unit)

NTNY11AA MG 9000 shelf The following figure displays the shelf partitioning, card layout, and slot numbering for the MG 9000 shelf. The top numbering of card slots 1-21 is the physical slot numbering. The lower numbering of card slots 0-15 is the logical slot numbering.

Figure 7 MG 9000 shelf layout and card slot numbering

The MG 9000 shelf contains voice and data domains. The domains are independent in the hardware architecture, which prevent traffic conditions in one domain from degrading the operating capacity in the other domain.

The voice domain includes the voice termination part of each line card and the Internet telephony processor (ITP) common equipment cards.

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Hardware 25

Subscriber traffic and internal control messages pass between the voice band line cards and the ITP common equipment cards.

The data domain has the same architecture as the voice domain, implemented on ADSL line cards and ATM common equipment cards. Subscriber traffic routes directly between the ATM common equipment card and the data line cards. Internal control messaging routes from the ATM common equipment across GLAN links, through the TDM common equipment cards, to the line cards.

The MG 9000 shelf infrastructure overlaps the voice and data domains to provide the following common resources that support the operations of the voice and data domains:

The GLAN message link provides a path for circuit cards to communicate with the GLAN hub. The GLAN message link is used for real-time signaling and operations, administration, and maintenance (OAM) messages. No voice or data traffic is transmitted on the GLAN message link. The GLAN hub is redundant, one each on the pair of ITP circuit cards. Each client is attached to both GLAN planes. The inactive GLAN hub broadcasts a pseudo-random pattern to all clients and verifies a correct loopback from each client. The following figure shows the GLAN configuration.

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26 Functional description

Figure 8 GLAN configuration

metallic test access (MTA) interconnection - The MTA buses extend across each shelf to each line card slot. A relay matrix on the Shelf Interface Card (SIC) (NTNY23AA) controls the connection of the MTA buses on each shelf to the system MTA bus. Each line card taps onto the shelf-level bus and includes a relay matrix circuit that bridges the test bus onto the subscriber loop or into the coder-decoder (CODEC) under test. The MTA circuitry can also support line sparing for switched lines application.

ringing generation on each line card

shelf-level alarms

battery power - Both signal and talk battery rails are distributed to the circuit cards in the shelf across the backplane. Power rails originate at the breaker interface panel (BIP), which has circuit breakers for each rail and a talk battery filter (TBF) for each talk battery source. The rails distribute to every shelf where they appear at the power input/output card which performs filtering for the shelf.

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NTNY17BA Intelligent bay interface panel shelf The following figure provides a front view of the IBIP shelf.

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Hardware 27

Each circuit card has an on-board point of-use power supply (PUPS) circuit to regulate the local voltage rails from signal battery. The MG 9000 shelf does not contain batteries. Talk Battery A and B are supplied through the backplane providing fully redundant power to line card slots 02-09 and 14-21.

synchronization distribution - The voice and data domains derive clock synchronization from their respective core networks, based on software configurations.

All interconnect cables plug into faceplate connectors on the circuit cards in the MG 9000 shelf.

NTNY15AA Air filter assembly The NTNY15AA Air filter assembly consists of a fixed chassis and removable drawer which houses the air filter itself. The air filter is a replaceable element, using Nortel part number A0379322. The following figure shows the air filter assembly.

Figure 9 Air filter assembly

28 Functional description

Figure 10 NTNY17BA IBIP shelf showing fuse panel

The IBIP includes the following which are discussed next:

fuse panel

NTNY25BA Dual Talk Battery Filter cards

NTNY27AA Current Sensors

NTNY28AA Alarm Relay card

NTNY29AA Alarm Processor card

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IBIP fuse panel The fuse panel on the IBIP front panel protects the individual dc loads in the MG 9000 frame such as shelves and cooling units and permits them to be disconnected in a maintenance scenario. The assemblies are protected by 20 fuses.

In the signal battery section, there are four fully redundant dc branch circuits for signal or common equipment power. These are distributed into

two 15 A dc fuses from feeders -LA1 and -LB1 for shelves 2 and 3

two 15 A dc fuses from feeders -LA2 and -LB2 for shelves 0 and 1

The four 30 A talk battery feeders -LTA1, -LTA2, -LTB1, and -LTB2 are filtered by four filter inductors and two NTNY25BA Dual Talk Battery Filter cards. These talk battery feeders are distributed into

two 12 A dc fuses from feeders -LTA1 and -LTB1 for shelves 2 and 3

two 12 A dc fuses from feeders -LTA2 and -LTB2 for shelves 0 and 1

This design provides for a 12 A dual plane redundant shelf talk battery power feed. A fused redundant feed for the cooling units is derived from feeders -LTA1, -LTA2, -LTB1, and -LTB2. Total talk battery feed current includes both the cooling unit current draw and the talk battery current draw. The cooling unit fuses size is 15 A dc to allow for high inrush currents related to the fan motors startup characteristics. Fuse modules on the fuse panel have an LED that indicates a fuse is blown.

NTNY25BA dual talk battery filter card The two NTNY25BA Dual Talk Battery Filter cards in the IBIP provide a clean -48 V dc power supply for POTS loop feed. Each card serves as the talk battery filter capacitor for both A or both B talk battery feeds.

The alarm circuitry in the NTNY25BA card provides monitoring and reporting function for the talk battery filter. The Fail LED on the faceplate indicates a talk battery filter alarm has occurred. The LED is controlled by the NTNY29AA Alarm Processor card in the IBIP.

NTNY27AA shelf talk battery current sensing The NTNY27AA Current sensors monitor both the A and B -48V talk battery power feed currents to each shelf.

The alarm circuitry in the NTNY27AA cards provides monitoring and reporting for the internal current sensor circuitry. The card implements fuse protection for each power input and monitors each fuse. A Safe to Pull LED on the faceplate is illuminated and is controlled by the NTNY29AA Alarm Processor card in the IBIP.

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30 Functional description

NTNY28AA alarm relay card The alarm and system monitoring functions of the IBIP are split between the NTNY29AA Alarm Processor card and the NTNY28AA. The following represents the functions on the Alarm Relay card:

fuse fail detection - detects fuse failures on the power provided to each shelf, to each cooling unit, and ABS to the BIP. There will be one signal provided from each of the 21 fuses. Sixteen are for shelf power, four are for cooling unit power, and one is from ABS power. The fuses for the cooling unit and the shelf power all have LEDs on the front of the fuse as a failure signal. Fuse failure signals are multiplexed together into the following five groups: talk battery fuse failure signal battery fuse failure cooling unit 1 fuse failure cooling unit 2 fuse failure ABS fuse failure These failures are sent to the SIC. Using these signal along with power loss information provided by the SIC, the exact failed fuse is determined.

lamp driver - indicates system failure severity, frame failure, and lamp power available. Though the signals are provided by the NTNY29AA to drive the lamps, the failure level is not be determined by the NTNY29AA but is determined by one of the ITP cards in the frame. Power for the lamps is provided through the ABS power inputs.

E2A telemetry interface - The NTNY28AA provides 11 scan points (SC) and 4 signal distribution points (SD) for use as alarm interface to other OEM or environmental equipment.

OAU interface - There are three visual signal, three audible signal, and an Alarm Cut-Off (ACO) signal. The three visual signals are closed loop contact pairs that used to indicate the status of the visual lamps in the frame. The three audible contacts are closed loop contact pairs used to indicate the severity of the alarms at the frame. The ACO is used by the office alarm unit to cutoff the audible portion of the alarm. This has no effect on the visual alarms.

NTNY29AA alarm processor card The alarm and system monitoring functions of the new IBIP are split between two cards with half of

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Hardware 31

the functionality on the NTNY29AA and the rest on NTNY28AA. The NTNY29AA has the following features:

micro controller - provides all the intelligence for the IBIP controlling both the NTNY29AA and the NTNY28AA.

talk battery current monitoring - monitors talk battery current to each shelf and messages the SIC when current on a shelf feed exceeds 25 A.

incoming feed voltage monitors - monitor all nine incoming power feeds for loss of power. This includes the feeds for signal battery, talk battery, and ABS.

frame level LED drivers - drives the LEDs on various frame level circuits.

cooling unit interface - alarm detection circuits for both of the cooling units. One signal is for a fan failure while the other is for high temperature.

aisle cable Interface - provides the loop signal necessary to activate the aisle alarm in the event of a failure in the associated frame. The aisle alarm is two of the wires provided in the aisle cable.

shelf ID - provides shelf ID information to the SIC of each shelf to determine the shelf position in the frame.

frame ID - provides frame ID information to the SIC upon request. The Frame ID will be set on a 4-position switch (S2) that can be read by the micro controller. This switch can provide for 15 possible frames with the 0000 bit setting being a not allowed condition. Switch bank S2 switch positions are provided in the card replacement procedure for the alarm processor card in Nortel MG 9000 Fault Management (NN10074-911).

power option switch - Since a frame can be physically set to power only two shelves (either shelves 0 and 1 or 2 and 3), then the power monitors have to be set to ignore the feeds that are not to be used. This switch (S1) will use two of the positions to provide the choices. Switch bank S1 switch positions are provided in the card replacement procedure for the alarm processor card in Nortel MG 9000 Fault Management (NN10074-911),

NTNY18AA cooling unit shelf The NTNY18AA cooling unit (CU) shelf provides cooling for the MG 9000. The cooling unit

contains eight fans

supports low battery shutdown

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32 Functional description

has a fan fail indicator for each fan, which allows the replacement of a single fan rather than an entire tray

monitors for high ambient temperature and fan fail conditions. The BIP alarm card drives this signal over the DCC.

includes an NTNY16AA local craft access panel (LCAP), which is a part of the middle cooling unit and physically mounts on the cooling unit. Functions and interfaces include three DS1 test jacks for each shelf are used to provide test

capabilities for each MG 9000 shelf that provides DS1 private line service for testing into the line card, testing to the facility and providing DS0 service. data jacks provide test capabilities for each MG 9000 shelf that

provides DS1 private line service. Three jack pairs are provided for testing into the line card, testing to the facility and providing DS0 service. local talk line circuit jacks provide a non-switched communication

path that allows communication through the central office (CO) on the office key system. alarm cutoff (ACO) push button and light emitting diode (LED) assembly are used with the alarm card located in the BIP electrostatic discharge (ESD) jack is used by the technician to

connect to ESD wrist straps when performing maintenance tasks

The following figure provides an isometric view of the NTNY18AA cooling unit.

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Hardware 33

Figure 11 NTNY18AA cooling unit and LCAP

The following figure shows the NTNY16AA LCAP.

Figure 12 NTNY16AA LCAP

Common cards

This section provides a description of the following MG 9000 common cards.

Table 9 MG 9000 common cards

PEC Description

NTNY23AA Shelf interface card

NTNY26AA Power filter card

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34 Functional description

NTNY23AA: shelf interface card The SIC is located in the top half of physical slot 1 (upper part of slot) of the MG 9000 shelf and is always required. The SIC works with the alarm relay card for the MG 9000 BIP. The SIC provides

the MG 9000 shelf interface to the BIP to provide: alarm inputs (minor, major and critical) that originate from the MG

9000 shelf alarm outputs and indicators that display in the MG 9000 shelf user alarm inputs to the BIP that are available to the MG 9000 shelf status of the cooling unit

a unique shelf ID from the IBIP alarm card to each of the four MG 9000 shelves in a frame to facilitate auto-discovery at the shelf level

control for the MTA buses for the MG 9000 shelf There are two DB9 port connectors on the faceplate of the SIC that are labeled as MTA In and MTA Out. The bottom connector labeled MTA Out connects to the test head to support line testing. The top connector connects to the SIC card in the shelf above.

the voltage threshold monitoring of both signal battery supplies A and B on board the MG 9000 SIC to report loss of power redundancy on the SIC

The SIC has the following LEDs on the faceplate.

Indication Color Description

OK to pull Red Indicates to the operator that the SIC

card is in an appropriate state for removal from the shelf.

Shelf Alarm Red Indicates that a failure exists on a

component that is local to this shelf.

Active Green Lights when the SIC is in a normal

working state The SIC interface to the backplane is through the GLAN. The GLAN is a point-to-point LAN from a hub on the ITP control card.

The next figure is an illustration of the SIC and associated connectors.

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NTNY26AA: power filter card The NTNY26AA Power filter card (PFC) is always required. The Power filter card provides filtering of talk battery A/B feeds and signal battery A/B feeds. The Power filter card resides in the lower half of slot 1 in the MG 9000 shelf. A Fuse Fail LED on the faceplate indicates a fuse failure on the fused power inputs. The fuses are internal to the card and are not replaceable. Power test points are available on the faceplate of the power filter card for connecting a voltmeter to measure shelf power voltages.

The following figure shows the NTNY26AA faceplate.

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Hardware 35

Figure 13 NTNY23AA: shelf interface card connectors

36 Functional description

Figure 14 NTNY26AA faceplate

Common control cards

This section provides a description of the following MG 9000 common control cards.

Table 10 MG 9000 common control cards

PEC Description

NTNY45 Data control card

NTNY30 Internet telephony processor

NTNY45AA: data control card with OC-3c WAN The WAN interface supports ATM over SONET. The NTNY45AA contains all the functions listed in the NTNY45 and also supports the following functions:

provides an automatic protection switched OC-3c/STM-1c WAN physical interface to the network

supports an ATM cell based interface to the network

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Hardware 37

provides a pair of network processors for processing cells and/or packets

provides six copper subtending interfaces for three subtending shelves

provides six fiber subtending interfaces for three subtending frames

The following figure shows the faceplate of the NTNY45AA.

Figure 15 NTNY45AA DCC

38 Functional description

The following table lists the connectors on the faceplate of the NTNY45AA card.

Table 11 NTNY45AA connectors

Connector Description

Ethernet 10/100 T Ethernet connector used for the local craft interface (LCI)

BITS Built-in timing supply (BITS) interface for use as a system timing

reference

Shelf Sub Supports six copper connections for three subtending shelves

Frame Sub Six fiber connections for three subtending frames

OC-3/STM-1 OC-3/STM-1 optical connector to packet network

NTNY45BA: data control card - 8 port IMA WAN The NTNY45BA is the same card as the NTNY45AA card except for the interface. The WAN interface on the daughter board is a redundant 8 port DS1 IMA interface. In addition to the functions listed for the NTNY45, the NTNY45BA also provides protection switched eight-port DS1 IMA interface for cell transport. The NTNY45BA DS1-IMA card supports up to four shelves.

The following figure shows the faceplate of the NTNY45BA.

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The following table lists the connectors on the faceplate of the NTNY45BA card.

Table 12 NTNY45BA connectors

Connector Description

Ethernet 10/100 T Ethernet connector used for the local craft interface (LCI)

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Hardware 39

Figure 16 NTNY45BA DCC with DS1 IMA

40 Functional description

Table 12 NTNY45BA connectors (cont’d.)

Connector Description

BITS Built-in timing supply (BITS) interface for use as a system timing

reference

DS1 8 port DS1 IMA connector

NTNY45FA gigabit ethernet (GigE) data control card The NTNY45FA GigE card has all the same capabilities of the NTNY45AA. In addition, the NTNY45FA supports

a GigE interface to the IP network. Currently, one GigE port per card connects to the IP network, though in the future this will increase to four. The cards are hot-swappable and provide GigE link redundancy. The GigE DCC card does not support network interface timing. The NTNY45FA card does not support DS1 private lines services or xDSL services in SN08.

a connection to an international standard Synchronization Supply Unit (SSU) using 2048 kHz interfaces and sends those 2048 kHz signals to the ITP card as the timing reference source for the MG 9000.

The following figure shows the faceplate of the NTNY45FA GigE DCC card.

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The following table lists the connectors on the faceplate of the NTNY45FA card.

Table 13 NTNY45FA connectors

Connector Description

Ethernet 10/100 T Ethernet connector used for the local craft interface (LCI)

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Figure 17 NTNY45FA GigE DCC card faceplate

42 Functional description

Table 13 NTNY45FA connectors (cont’d.)

Connector Description

BITS/SSU Built-in timing supply (BITS) interface for use as a system timing

reference or Synchronization Supply Unit (SSU)

GigE Four GigE ports to support WAN interfaces and subtending boxes.

For each optical cable connected to a GigE port, an NTTP62CF small form factor pluggable (SFP) LX transceiver device or an NTTP62AF SFP SX transceiver device (future) connects to the GigE port on the faceplate of the GigE card. The cable connects to the SFP device. The SFP device is monitored by the NTNY45FA GigE DCC card. Any errors detected in the SFP are reported to the MG 9000 Manager in GigE log reports. There is a comparable SFP transceiver device at the other end of the cable which is monitored by the network element at that end.

Figure 18 NTTP62 SFP transceiver device

NTNY45 Supercore 2 data control cards A new Supercore 2 (SC2) Data Control Card (DCC) for the MG 9000 is introduced in SN10. The SC2 DCC has been designed as an update to the SC1 DCC, The SC2 offers greater capacity and higher efficiency than its predecessor.

The NTNY45 SC2 is the control complex and wide area network (WAN) for the MG 9000. Unlike the SC1 cards (which have a motherboard and sub-pack), SC2 cards have a single board that contains all of the card’s circuitry. the processor, the ATM switch fabric, the network processors. the serial ATM links to each card on the shelf, the WAN interface, and the BITS interfaces, which support additional frames via high speed links. The WAN interface supports both ATM over SONET and Packet over Ethernet.

Two versions of the SC2 DCCs will be available for use in the MG 9000 beginning in SN10.

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PEC Description Packet network interface

NTNY45OA Data control card - OC-3 WAN

(SCO)

OC-3/STM-1

NTNY45GA Data control card - Gigabit

Ethernet (GigE) (SCG)

1 Gig/sec Ethernet

The three SC2 DCCs are intended to replace their predecessor. The following shows the compatible PEC replacements:

Interface type Software load

designation

SC1 PEC SC2 PEC

OC3 SCO NTNY45AA/CA NTNY45OA

GigE SCG NTNY45FA NTNY45GA

Like the SC1 DCCs, the SC2s are used in pairs for redundancy and are always provisioned in slots 10 and 11 of the MG 9000 master shelf. All SC2 DCCs must be provisioned with SN10 or later software loads.

SC1 and SC2 DCC cards can operate together on the same MG 9000. For example, an SC1 can reside in slot 10 while an SC2 resides in slot 11. Both cards do not have to be SC2s.

The SC2 has the following elements in common with the SC1 including:

Existing software loads, SCO, and SCG can run on both hardware platforms. For example, the SCO load will run on SC1 and SC2.

PQ2 is identical to the existing design. There are no changes to GPIO pins, Utopia buses, serial interfaces, or the Ethernet interface.

The Mojo, Utonium and Backplane FPGAs while consolidated into a single FPGA, will remain identical to the existing design.

Memory maps

BITS interface

TADM

GigE WAN interface

The function of the NTNY45 SC2 is distinguished from the SC1 in the following ways:

Processor memory increased by 2X to 256 Mbytes

Processor flash increased by 2X to 128 Mbytes

Adds a dedicated Flash memory to be used as a error log to enhance in-service troubleshooting

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44 Functional description

Hardware support for IPV6. The look up CAM has been removed and replaced with an nP3700 hashing engine (Currently there is no plan to release software to support IPV6.)

Increase processor speed from 333Mhz to 450Mhz

Increase processor bus speed from 66Mhz. The target is to run the bus at 100 MhzThe SC2 DCCs share the following features:

Processor complex: 450 Mhz/133Mhz PowerPC core/CPM PQ2 256 MByte SDRAM on 60x bus 16 MByte SDRAM on local bus 128 MByte FLASH 16MBtye FLASH used for S/W logs and error

messages 100 Mhz bus speed (target) IDPROM (SPI) RS-232 faceplate access (SCC) 10/100Mb Ethernet faceplate access (FCC) GLAN (FCC) 8 bit Utopia interface for AAL5 SAR (FCC) FPGA configuration via SPI Activity control using a combination of port bits,

60x bus and PLD circuitry 60x bus access interfacing with all memory and

registers on the card Interrupt handling

AMCC nP3700 Integrated Network Processor. This processor has the following features: Integrated traffic manager Integrated cell based switch fabric Three network processor cores running at 400

MHz

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Two Posphy-3 packet buses Integrated Hashing engine for lookups and

translations

External memory: Packet database memory: 64 MB with a capacity

of 1M cells. The memory interface is 72 bits wide, using two 8 Mb x 36 devices. The devices are RLDRAM-II technology. Flow database memory: two 1 Mb x 18 QDR-II

SRAMs Channel service memory: two 1 Mb x 18 QDR-II

SRAMs

NTNY45OA data control card with OC-3 WAN In addition to the functions listed for the NTNY45AA and those common to all SC2 DCCs, the NTNY45OA also supports the following functions:

The current SCO has two Cell router FPGAs, the Utonium and the Mojo. Functionally these FPGAs will continue to exist in the SC2, but they along with the Backplane FPGA are combined into a single physical FPGA instead of three separate FPGAs. Neither the memory maps or the external interfaces will change on the SC2.

Two BITS interfaces. implemented in the same manner as the NTNY45FA design.

The following table provides the transmit and receive power levels for the OC-3 interface on the NTNY45OA DCC card.

Tx optical (dBm) Rx optical (dBm)

Physical interface

Specifica-t

Max Min Max Min Optical

Nominal ions

system gain

wavelength (dB)

(nm)

OC-3 GR-253

IR-1

-8.0 -15.0 -8.0 -28.0 13 1310

The following figure shows a block diagram of the NTNY45OA DCC card.

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46 Functional description

Figure 19 NTNY45OA block diagram

The following figure shows the faceplate of the NTNY45OA.

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The following table indicates the connectors on the faceplate of the NTNY45OA card

Connector Descriptions

Ethernet 10/100 T Ethernet connector used for the local craft interface

(LCI)

BITS Built-in timing supply (BITS) interface for use as a system

timing reference

OC-3 OC-3 optical connector to ATM network

NTNY45GA GigE card The GigE interface card provides a GigE port for IP connectivity to the packet network. In addition to the functions listed for the NTNY45FA and those that are common to all SC2 DCCs, The

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Figure 20 NTNT45OA faceplate

48 Functional description

NTNY45GA GigE interface card introduced in SN10 has the following features:

The NTNY45GA GigE card supports a single optical interface, in contrast to the NTNY45FA, which supports four GigE interfaces (although only one of the four interfaces is available at any one time).

GigE APS crossover has been removed because it is not required for a single optical interface.

The OC-3 optical interface is a pluggable module offering integrated optical monitoring. This integrated monitoring replaces the existing DAS and associated circuitry.

The current SCG has two cell router FPGAs, the Utonium and the Mojo. Functionally these will continue to exist in the SC2, but they along with the Backplane FPGA are combined into a single physical FPGA instead of three separate FPGAs. Neither the memory maps or the external interfaces will change on the SC2.

The following figure shows the faceplate of the NTNY45GA GigE DCC card.

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The following table lists the connectors on the faceplate of the NTNY45GA card.

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Hardware 49

Figure 21 NTNY45GA faceplate

50 Functional description

Connector Description

Ethernet 10/100 T Ethernet connector used for the local craft

interface (LCI)

BITS/SSU Built-in timing supply (BITS) interface for use as a

system timing reference or Synchronization Supply Unit (SSU)

GigE GigE connector to support GigE WAN interface A block diagram of the NTNY45GA appears in the following figure.

Figure 22 NTNY45GA block diagram

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NTNY30: internet telephony processor Two ITP cards are available for use in the MG 9000 depending on the solution in which the MG 9000 is deployed. The following table lists the ITP cards used in the MG 9000.

Table 14 ITP cards

PEC Description Application

NTNY30AB Internet Telephony Processor - ATM Interface

card

UA-AAL1

NTNY30BA Internet Telephony Processor - IP Interface card UA-IP

NTNY30CA Internet Telephony Processor UA-IP

The characteristics that are common to both cards are provided in this section. The specific characteristics for the two card types are addressed separately following this section.

The ITP card

provides subtending to additional MG 9000 shelves

processes the ATM-25 line the ITX card creates. The ATM-25 data transmits back to the main control shelf for multiplexing onto the DCC connector.

works in pairs (for protection). Each MG 9000 shelf contains two ITP cards.

connects with corresponding ITX cards

receives timing synchronization from one of six reference sources and distribution to both ITP cards. Timing synchronization is the synchronization of the ITP clock to one of six reference sources. For example the OC-3 (x2) reference source, BITS DS1 (x2) reference source or internal (x2) reference source. The timing synchronization is generated by a voltage controlled oscillator on the ITP card. The MG 9000 accepts an external BITS DS1 input signal, referenced to a Stratum timing source that is Stratum-3 or better. Line and BITS timing methods are used.

provides the following maintenance functions for the MG 9000: lights the fail light emitting diode (LED) on the shelf cards monitors the operation of the GLAN messaging links

resides in the shelf interconnect section of each MG 9000 shelf, including the main controller and subtending shelves, in physical slot positions 12 and 13

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52 Functional description

The ITP card provides:

line interface and timing distribution for 16 line cards (32 lines/card) timing distribution refers to the allocation of a clock signal. The clock signal is derived from the main timing source to the line cards, for synchronization of TDM data flow between the line cards and the ITP card.

GLAN messaging hub interface

switching for 2048 TDM channels on the line card TDM links

line-side echo cancellation functionality

The following figure provides a front view of the ITP card and associated connectors.

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NTNY30AB: internet telephony processor - ATM interface card The NTNY30AB provides the call processing and media coding capabilities of the MG 9000 in the UA-AAL1 solution. Each ITP card is viewed as a virtual media gateway (VMG), that is, the CS 2000/Gateway Controller (GWC) view each ITP card as an individual gateway.

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Figure 23 NTNY30 internet telephony processor

54 Functional description

In addition to the functions listed in the general description of the NTNY30, the ITP-ATM interface card

adapts TDM DS-0s to ATM cells for transmission over a Synchronous Optical Network (SONET) through an OC-3c optical interface

provides line card control and termination in the MG 9000 shelf platform

uses AAL-1 SDT to convert TDM PCM data to ATM cells

is required with an ITX or DCC card in private lines whenever a BITS timing reference is to be used as the master timing reference. The physical DS1 connection for the BITS reference resides on the ITX or DCC card, and the clock synchronization circuitry resides on the ITP card.

provides plug-in echo canceller module

provides segmentation and reassembly on the TDM links to ATM cells using AAL-1 adaptation

NTNY30BA internet telephony processor - IP interface card The NTNY30BA is similar to the NTNY30AB except that the NTNY30BA card is designed to support IP functionality.

The NTNY30BA contains the DSP processing hardware for voice over IP capability. This card is used in the UA-IP solution.

In addition to the functions listed in the general description of the NTNY30, the ITP-IP interface card

supports introduction of the MG 9000 into the international market in the UA-IP solution, the ITP card provides downloading characteristics templates to the POTS card and combo cards in the form of line power templates. This affects the following three areas: CLASS - In addition to the hard-coded support for North America, downloadable parameters that comply with ETSI Specification EN 300-659-1, -2, and -3 are available from the MG 9000 Manager. physical ringing - the existing downloadable ringing patterns for

North American are being expanded to provide downloadable market-specific patterns from the MG 9000 Manager.

supports G.711 CODEC for voice over IP. The NTNY30BA card supports silence suppression but does not support compression.

NTNY30CA: internet telephony processor card The NTNY30CA provides the call processing and media coding capabilities of the MG

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9000 in the UA-IP solution for North America and international markets. Each ITP card is viewed as a virtual media gateway (VMG), that is, the CS 2000/Gateway Controller (GWC) view each ITP card as an individual gateway. In addition to the functions listed in the general description of the NTNY30, the ITP interface card

adapts TDM DS-0s to ATM cells for transmission over a Synchronous Optical Network (SONET) through a OC-3c optical interface

provides line card control and termination in the MG 9000 shelf platform

provides 128 Mb of on-board synchronous dynamic RAM (DRAM)

is required with an ITX or DCC card in private lines whenever a BITS timing reference is to be used as the master timing reference. The physical DS1 connection for the BITS reference resides on the ITX or DCC card, and the clock synchronization circuitry resides on the ITP card.

provides segmentation and reassembly on the TDM links to ATM cells using AAL-1 adaptation

supports G.711 CODEC for VoIP. The NTNY30CA card supports silence suppression but does not support compression.

The ITP contains three RJ-45 type connectors. The next figure provides a front view of the ITP card and associated connectors.

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56 Functional description

Figure 24 NTNY30CA internet telephony processor connectors

Line/service card: ITX card

The following card is a line/service card that supports all line/service cards in the MG 9000 shelf.

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Table 15 Common line/service card

PEC Description

NTNY41AA Internet telephony extender

NTNY41AA: internet telephony extender The ITX circuit card

supports subtended MG 9000 shelves

creates an ATM-25 link to transmit data to the main control shelf

connects to corresponding ITP cards

works in pairs Each MG 9000 master shelf requires a minimum of two ITX cards. Each ITX pair supports a maximum of fifteen additional MG 9000

shelves in a UA-AAL1 solution. The system supports a maximum of four (two pair) ITX cards, and

a total of 16 MG 9000 shelves (including the control shelf).

terminates external BITS timing source (first pair only)

The ITX card contains eight RJ45 type connectors for subtending and one DB-9 connector for a timing source.

The following figure shows the physical connections to the BITS terminal using DB-9 connectors on the ITX card faceplate. If a BITS clock is used, this configuration is required to ensure the MG 9000 is clocked properly.

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58 Functional description

Figure 25 MG 9000 to BITS terminal connection configuration

The following figure provides a front view of the ITX card and connectors.

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In a multi-shelf switched lines application, ITX cards are provisioned in pairs in the right side of the master shelf. It is recommended that the first pair of ITX cards be provisioned in physical slots 14 and 15, of the master shelf, though they can be provisioned in any two slots as long as they are in even/odd adjacent slots.

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Figure 26 NTNY41AA ITX card

60 Functional description

NTNY41BA: internet telephony extender The ITX circuit card

works in pairs: Each MG 9000 master shelf requires a minimum of 2 ITX cards Each ITX pair supports a maximum of 8 MG 9000 shelves The system supports a maximum of 8 (four pairs) ITX cards, and a

total of 32 MG 9000 shelves (including the control shelf). This is a future capability. The BITS connector has been removed.

creates a an ATM-25 link to transmit data to the main control shelf.

connects to corresponding ITP cards

includes an activity connector to provide improved card activity under control of hardware by communicating card activity state between an ITX pair

The NTNY41BA ITX card contains eight RJ-45 type connectors for subtending and one RJ45 connector for activity connector. The next figure provide a front view of the NTNY41BA ITX card and connectors.

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Line/service cards: switched lines cards

This section describes the following cards that support switched lines.

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Figure 27 NTNY41BA ITX card connectors

62 Functional description

Table 16 Switched lines circuit cards

PEC Description Application

NTNY42AA

NTNY42AB

MTA-TRC card UA-AAL1 and UA-IP

solutions

NTNY43AA

NTNY43BA

DS-512 Interface card UA-AAL1 solution

UA-IP solution

NTNY50AA POTS 32-Line Multi-circuit line card UA-AAL1 and UA-IP

solutions

NTNY53AA

NTNY53BA

Global line card 32 UA-AAL1 and UA-IP

solutions

NTNY51AA SAA-12 line card UA-AAL1 and UA-IP

solutions

NTNY53CA GLC 12-line card UA-AAL1 and UA-IP

solutions

NTNY52AA ADSL combo 8+8 line card UA-AAL1 and UA-IP

solutions

NTNY42AA or NTNY42AB: metallic test access-TRC card The metallic test access-test response circuit (MTA-TRC) is a component of the MG 9000 metallic test access subsystem. The MTA-TRC card provides a means for external test head equipment to ultimately access, through its matrix of relays, subscriber lines, and associated line card interfaces for testing purposes. It allows for extension of the MTA buses from shelf to shelf and frame to frame. Furthermore, it provides TRC capability used in line card diagnostics.

The MTA provides

backplane GLAN interface, which allows the MG 9000 ITP card to communicate with the MTA

faceplate connector interface for extending metallic test access buses to the SIC, which allows

connection to subtending shelves within the same frame extending metallic test buses to additional frames external metallic line test equipment (test head)

relay matrix for selective connectivity of metallic test buses with possible

connections to its own shelf, extension shelves, extension frames,

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or to test head equipment. GLAN messaging from the TDM card controls the matrix. segmenting interframe test buses for wideband tests. Segmenting

eliminates stubs that can impair high frequency tests.

test response circuitry

The primary purpose of a test response circuit is to assist in the testing of line cards. Testing of line cards is accomplished by providing controlled terminations to the line card to simulate live subscriber line connections. By using analog/digital (A/D) converters, the test response circuitry detects voltage responses generated by the line card and reports the voltage responses upon request.

The next figure is an illustration of the MTA-TRC card.

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64 Functional description

Figure 28 MTA-TRC card

Third party test head requirements The MTA-TRC card provides a dedicated RJ45 faceplate connector for third party test head access. The RJ45 port provides eight pins for a total of four possible tip and ring metallic test access pair connections. Depending on the system configuration, one of the RJ45 faceplate ports can also be used for interfacing to additional test heads. The RJ45 faceplate ports can be used for test head access when the associated MTA is at the end of a MG 9000 frame line up. Figure shows the connectors on the faceplate of the MTA-TRC card and identifies the purpose of each connector.

The following table contains pinout information for the RJ45 faceplate connector.

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Table 17 Pinout for RJ45 test head interface connector

Pin number Description

1 Test head pair 0 tip

2 Test head pair 0 ring

3 Test head pair 1 tip

4 Test head pair 1 ring

5 Test head pair 2 tip

6 Test head pair 2 ring

7 Test head pair 3 tip

8 Test head pair 3 ring The purpose of the third party test head is to verify the quality of subscriber lines. The third party test head is mounted external to the MG 9000 frame. The choice of the test head used, is that of the equipment owner.

The third party test head must support:

POTS and xDSL lines

receiving commands from the OSS, executing those commands and responding with data or an acknowledgement

performing various network diagnostic functions, such as load coil detection, loop length measurement and longitudinal balance for single ended loop qualification

measuring AC and DC voltage, current, resistance and capacitance between a test line’s tip and ground, ring and ground, and tip and ring

measuring tones and levels such as dial tones, dual-tone multi frequency (DTMF) digits and analyze dial pulses

providing the following tests that measure the electrical characteristics of the subscriber line: dc delta three terminal measurement dc current dc resistance dc voltage ac delta three terminal measurement ac current ac resistance ac voltage

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66 Functional descriptionloop length measurement

load coil detection and location longitudinal balance hazardous potential detection apply ringing single sided resistive fault sectionalization loop resistance through interactive testing

providing the following audio tests: interactive callback with talk/monitor electronic voice detection dial tone analysis voice band single frequency tone recognition (intercept tone

through switch) metallic tone generation longitudinal tone generation rotary dial testing DTMF dial testing switch hook flash metallic and longitudinal pair ID tones

providing the following wideband functions: single ended loop pre-qualifications up to 18,000 feet bridged tap detection and location crosstalk and wideband noise measurement ADSL quiet tone generation

providing the following coin telephone functions: coin telephone totalizer homing coin telephone collect and return

providing the following network diagnostic functions: integrated services digital network (ISDN) NT1 maintenance mode

activation load coil detection and location

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NTNY43AA: DS-512 access bridging interface card The NTNY43AA DS-512 ABI card supports DS-512 fiber link connection between ESMAs and LGCIs and the MG 9000. Each DS-512 card hosts a single DS-512 fiber link, consisting of one downstream/TX fiber and one upstream/RX fiber. The ABI card is not supported on an MG 9000 with DS1-IMA cards.

A pair of DS-512 cards is needed to service both planes (0 and 1) of the XPM. Only one DS-512 is active at any given moment. Activity data is exchanged between the two DS-512 cards through a cable connected to the faceplate of each DS-512 card. Bearer and message traffic is sent and received over both planes, through the DS-512 fiber, to the XPM. Only the active DS-512 card is permitted to send bearer traffic upstream to the active DCC card.

On the DS-512 (ABI) cards, the green Active LED remains continuously for both ABI cards in the protection group. This means both cards are providing service. The active ABI card is labeled in the MG 9000 Manager as Master, while the protected ABI card is labeled as Slave. In the MG 9000 Manager ABI Card View, the master card displays Providing_Service_Master in the Service Status field, while the slave card displays Providing_Service_Slave.

The following table lists the connectors on the faceplate of the NTNY43AA.

Table 18 NTNY43AA connectors

Connector Description

Mate Activity Used to communicate card activity state between a

DS-512 pair.

DS-512 pair Optical connections to subtending XPMs (one transmit

and one receive) The following figure shows the faceplate of the DS-512 card and connectors.

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68 Functional description

Figure 29 DS-512 card

NTNY43BA: ABI (DS-512) interface card The NTNY43BA DS-512 Interface card supports DS-512 fiber link connection between ESMAs and LGCIs and the MG 9000. Each DS-512 card hosts a single DS-512 fiber link, consisting of one downstream/TX fiber and one upstream/RX fiber. The NTNY43BA has 128 MB of memory. The NTNY43BA supports G.711 for UA-IP.

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NTNY50AA: POTS 32 multi-circuit line card The POTS 32 line card provides POTS-only service to 32 subscribers. The POTS Multi-circuit line card

is compatible with terminal sets with input and balance impedance according to North American standards

includes software selectable loop feed current limit characteristics with software selectable automatic loss equalization for short loops

has two test-in/test-out busses, test bus 1 and test bus 2, each subscriber interface circuit can access either bus

has an on-board PUPS

has a hold clip circuit that allows the MG 9000 shelf to place all loop interface circuits into protection, thereby allowing the circuits to be removed from any external voltages

has a dedicated ringing generator. The following table lists the characteristics of the on-board ringing generator.

Table 19 POTS-32 ringing generator characteristics

Characteristic Value Purpose

Input -48 V Input power

Output 100 Vrms at nominal 20 Hz,

superimposed on a dc offset equal to the talk battery voltage

Ringing voltage output. The ringing generator is capable of ringing 15 VA or 15 REN (ringing equivalent number) at the shortest loop length.

Frequency selective ringing (FSR)

Frequencies of 25 Hz or 50 Hz are software selectable

Alternate output frequencies

Zero crossing indicator

Indicates the output dc voltage zero crossing to prolong life of ringing relays.

dc feed resistance 205 O nominal

can reside in any available line/service card slots, 2-9 and 14-21. The number of line cards used on the master MG 9000 shelf is dependent on the number of ITX cards required for the MG 9000 node. Line cards must be provisioned from the left side of the shelf to the right side of the shelf.

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70 Functional description

Line loop resistance capabilities The line loop resistance capabilities of the NTNY50AA are summarized as follows:

Maximum total loop resistance (including telephone set) to detect an off-hook threshold of 21 mA: 1900 Ohms. This is based on the following: a normal talk battery range of -49 to -53.5 V a total loop resistance of 1900 Ohms, including telephone set

(assuming a 500-type residential telephone set with 21 mA loop current) a ringing capability versus loop length is a fixed sine wave

amplitude of 100 ± 7 Vrms

Maximum loop resistance (excluding telephone set) to ring a 5 REN load with a minimum of 40 Vrms: 1400 Ohms. This is based on the following: a minimum ringing voltage of the ringing generator of 93 Vrms, an LSSGR requirement of a minimum 40 Vrms delivered to a 5

REN load, and a 5 REN load defined as 1386 Ohms in series with a 40 mF

capacitor.

This means the maximum loop resistance, excluding the telephone set, but including all premises wiring between the operating company demarcation point and the telephone set, is 1400 Ohms. This resistance equates to a loop of 17,000 ft with 26 AWG wire.

NTNY51BA: SAA-12 line card The SAA-12 line card supports 12 subscriber lines.

The SAA-12 line card

is a programmable line card allowing service changes without modifications to the hardware configurations

has programmable line card impedance and balance network

has an on-board PUPS

supports North American Coin (requiring 100 V generator for coin return), P-Phone, loop-reversal, ground start, and POTS

has an on-board high voltage generator for each line that eliminates the need for common ringing generator. This high voltage generator also provides high voltage signals for coin control signaling and message waiting lamp control. The ringing capability is described in the following table.

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Table 20 SAA-12 ringing generator characteristics

Characteristic Value Explanation

Ringing voltage 40V minimum across a ringing load of 5 REN at the end of

any loop with a loop resistance of = 930 O (900 O + 30 O of customer premises wiring)

Ringing frequency 16 to 67 Hz 16 to 33.3 Hz

40 to 54 Hz

60 to 66.7 Hz

54 V rms

62 V rms

68 V rms

Ringing load 5 REN Impedance of 1400 O at 20 Hz

(A 1386 O resister in series with a 40 μF capacitor should be used as a 5 REN load.)

1 REN Impedance of 7000 O at 20 Hz

Ringing pattern Ringing Silent Ringing Silent Ringing Silent

A 0.4 0.2 0.4 0.2 0.8 4.0

B 0.2 0.1 0.2 0.1 0.6 4.0

C 0.8 0.4 0.8 4.0

D 0.4 0.2 0.6 4.0

E 1.2 4.0

F 1 ± 0.2 3 ± 0.3

G 0.4 0.2 0.4 0.2 0.3 4.0

Line loop resistance capabilities The line loop resistance capabilities of the NTNY51BA are summarized as follows:

Maximum total loop resistance (including telephone set) to detect an off-hook threshold of 21 mA: 1900 Ohms. This is based on the following: a normal talk battery range of -49 to -53.5 V a total loop resistance of 1900 Ohms, including telephone set

(assuming a 500-type residential telephone set with 21 mA loop current)

Maximum loop resistance (excluding telephone set) to ring a 5 REN load with a minimum of 40 Vrms: 1100 Ohms. This is based on the following:

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72 Functional descriptiona minimum ringing voltage of the ringing generator of 84 Vrms, an LSSGR requirement of a minimum 40 Vrms delivered to a 5

REN load, and a 5 REN load defined as 1386 Ohms in series with a 40 μF

capacitor.

This means the maximum loop resistance, excluding the telephone set, but including all premises wiring between the operating company demarcation point and the telephone set, is 1400 Ohms. This resistance equates to a loop of 17,000 ft with 26 AWG wire.

Loop current capabilities The loop current capabilities or the NTNY51BA are as follows:

POTS - for loop start lines, non-UVG: 1900 Ohms (1500 Ohms cable + 400 Ohms set) at 20 mA. This 1500 Ohms of cable translates to: 8,000 ft of 26 AWG (26 AWG twisted pair is approximately 83

Ohms/kft) 28,800 ft of 24 AWG (24 AWG twisted pair is approximately 52

Ohms/kft)

EBS - for P-Phone lines, the line card operates over the following loop range (between the line card and the EBS terminal): signaling range - 820 Ohms maximum loop dc resistance for 16 Volts across a set, sinking a constant 16 mA current, applies to M5009, M5112, and ac-powered display EBS sets. This 820 ohm resistance translates to: 9.800 ft of 26 AWG (26 AWG twisted pair is approximately 83

Ohms/kft) 15,700 ft of 24 AWG (24 AWG twisted pair is approximately 52

Ohms/kft) transmission range - 15 kft non-loaded cable, limited to 24 dB loss

at 8 kft between the card and the EBS set

Coin - for coin lines: signaling range - 900 Ohms loop + 550 Ohms terminal at 23 mA

minimum (a 20 mA in reverse feed). This 1450 Ohms of cable translates to

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17,400 ft of 26 AWG (26 AWG twisted pair is approximately 83

Ohms/kft) 27,800 ft of 24 AWG (24 AWG twisted pair is approximately 52

Ohms/kft) transmission range - 900 Ohm loop loaded or non-loaded cable up

to the Network Interface

NTNY53AA or NTNY53BA: global line card 32 The GLC 32 provides global services for the MG 9000 and supports 32 subscribers.

General characteristics GLC 32 cards share the following common characteristics:

can be used in an UA-IP or UA-ATM solution

terminate subscriber POTS loops for almost any country

provide a programmable loop interface that can support a wide range of customer requirements

reside in any available line/service card slots, 2-9 and 14-21. The number of line cards used on the master MG 9000 shelf is dependent on the number of ITX cards required for the MG 9000 node. Line cards should be provisioned from the left side of the shelf to the right side of the shelf.

operate over a battery supply voltage range of -42.5 V to -56.7 Volts. The normal operating conditions are a voltage greater than -48 V.

Global line cards support metering by polarity reversal. For the North American application, metering is not used.

comply with the protection requirements specified in Telcordia GR-1089 and ITU K.20

have a dedicated on-board ringing generator. The ring generator provides the ringing for the POTS circuits. The following table lists the characteristics of the on-board ringing generator.

Table 21 GLC 32 ringing generator characteristics

Characteristic Value Purpose

Input - 48 V Input power

Output Software selectable between 50 V

and 100 V

Ringing voltage output. The ringing generator is capable of ringing 20 VA at 75 V, 15 VA at 85 V, and 10 VA at 100 V.

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74 Functional description

Table 21 GLC 32 ringing generator characteristics (cont’d.)

Characteristic Value Purpose

Frequencies of 16.7Hz, 20Hz, 25Hz, and 50Hz are software selectable.

Registers allow selection of ring frequency and five RMS voltages: 65 V, 75 V, 86 V, 90 V, and 100 V

100 V at 20 Hz Ringing voltage output for the North

American application.

Unbalanced ringing with ringing occurring on the ring lead. The ac voltage that is output is offset by the -48 Vdc battery supply. Each loop supports 5 REN at a minimum of 85V.

provides voice test access on a per-port basis to the test busses in the MG 9000. The GLC 32 has two test busses. Test-in and test-out can be used on either of these busses, but not simultaneously. The card includes bus select/isolate relays to allow for the connection of each of the test busses to a centralized test head and for card isolation to minimize error when the test subsystem is being used by other cards. To help improve test capabilities, the GLC 32 card has two load relays (one on each test bus). This 1000 ohm load can be switched into the loop path and used to verify proper operation of the voice circuit without external test head access.

GLC 32 line services The GLC 32 cards support different line services:

GLC NTNY53AA cards support only POTS loop start and ground start

GLC NTNY53BA cards support POTS loopstart, POTS groundstart, and P-Phone/Electronic Business Set (EBS)

Backward compatibility The NTNY53BA card is backward compatible with the NTNY53AA, provided that the appropriate software is used. The NTNY53AA/BA can replace the existing NTNY50AA POTS32 card for North America. The NTNY53BA GLC can safely replace the GLC NTNY53AA and the WLC 32 without deprovisioning prior to replacement.

NTNY53AA/BA line loop characteristics The line loop characteristics of the NTNY53AA/BA are summarized as follows:

Loop reach - loop length of 1500 Ohms with customer premise equipment (CPE) load of 430 Ohms.

Loop currents - a maximum loop short-circuit current of 70mA, and is programmable to meet market requirements.

Hook detect currents - hook detect current thresholds are programmable. Off-hook and on-hook detect currents from 0 to 30 mA.

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Ring trip currents - consists of two portions: ring trip during ringing - programmable for both ac and dc, from 0 to

20 mA ring trip during the quiet period between rings - controlled by the

off-hook threshold

PCM coding law - selectable between u-law and A-law

Frequency range - supports a frequency range of 200 to 3400 Hz, as defined in Telcordia GR-507-Core

Return loss - is programmable, to meet individual country requirements

Load impedance - supports a wide range of load impedances, including those specified by Telcordia for North America ITU for the European countries.

Input impedance - supports a wide range of input impedances, including those specified by Telcordia for North America ITU for the European countries.

Longitudinal balance - supports longitudinal balances greater than 63dB, as defined in Telcordia GR-507-Core

Transmit and receive gain/loss - supports a wide range of gains and losses in the transmit and receive direction, from -20 to +20 dB Not all of the previous specifications can be met at the same time. There are interdependencies between several of them. For instance, you cannot provide 75mA on a 1500 ohm loop with a -48 V battery. Ohm’s law says you need greater than 112 volts from the battery supply.

additional characteristics defined for North America: Loop feeding -

for normal battery operation (-48 to -57.6V), the GLC-32

supports up to 19.5mA on a 1500 ohm loop into a 430 Ohm CPE load. for emergency battery operation (-42.75 to -48V), supports

up to 17.5mA on a 1500 ohm loop into a 430 ohm CPE load. Greater loop currents can be supported on shorter loop lengths. Hook detect:

Off hook: > 12mA On-hook: < 10mA Input Impedance: complex

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76 Functional descriptionResistance = 900 Ohms

Capacitance = 2.16 uF Load Impedance: complex

Resistance = 900 Ohms Capacitance = 2.16 uF Return loss -

20dB from 200-500 Hz 26 dB from 500-3400 Hz Transmit gain/loss - 0dB Receive gain/loss - 0dB

NTNY53CA: global line card 12 with coin line resource The NTNY53CA global line card (GLC 12) is a 12-port line card that provides global voice services for the MG 9000 together with Coin Line Resource (CLR) services for either the IP or ATM MG 9000 solution. It allows the platform to terminate subscriber POTS loops for almost any country. Voice services are designed to comply to both LSSGR and DLC specifications for North America, as well as the applicable specifications for other countries. In addition, P-Phone/EBS sets can be terminated on the GLC 12. The GLC 12 also supports a High Voltage (HV) Coin Line Interface that allows termination at a coin pay phone station.

The NTNY53CA GLC 12 is functionally identical to the NTNY53BA version of the GLC 32 card. The main differences are that the NTNY53CA card supports 12 lines and the Coin Line Resource (CLR) feature.

The NTNY53CA card can replace only the SAA-12 for P-Phone functionality and HV pay phone interface. The NTNY53CA 12-line GLC can only safely replace the SAA-12 card without deprovisioning prior to replacement.

Downloadable FPGA support for NTNY53BA GLC 32 and NTNY53CA GLC 12 cards The NTNY53BA/CA GLC cards feature firmware that can be upgraded in the field. Users can upgrade the configuration load by downloading new firmware for the Field Programmable Gate Array (FPGA) from the MG 9000 Manager (EM).

The GLC cards have two proms: the Factory PROM (FPROM) and the Upgrade PROM (UPROM). The FPROM contains a base image that is loaded at the factory, and cannot be modified in the field. The UPROM contains the latest FPGA image, and can be reprogrammed.

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On the MG 9000 Manager, the GLC Card View includes a field which displays the FPGA configuration load of a selected GLC card. The MG 9000 Upgrade Wizard (which you access from the EM), provides the interface for upgrading the firmware on the NTNY53BA/CA GLC cards. If you wish to upgrade one card, you must use the Software Download Manger. For further information, see Nortel Carrier Voice over IP Upgrade and Patches (NN10440-450).

Line/service cards: private lines cards

This section describes the following cards that support private lines.

Table 22 Private lines circuit cards

PEC Description

NTNY40AA DS1 AAL-1 Line Card

NTNY40AA: DS1 AAL-1 line card The DS1 card is a 16-port DS1 circuit emulation service (CES) card for the MG 9000. The DS1 card allows the platform to terminate TDM based DS1s and provides circuit emulation over ATM AAL-1. The DS1 card provides DS1 circuit emulation of 16 independent DS1s.

The DS1 card also provides the following functions:

line interface for 16 DS1s

structured DS1 N x 64 kbit/s service

unstructured DS1 service

The DS1 card can be placed in any line/service slot (2-9 and 14-21), from the left side of the MG 9000 shelf to the right side of the shelf. For private lines and mixed service applications DS1 slot assignments are limited to shelf 3.

Line/service cards: DSL

This section describes the following card that supports DSL lines.

Table 23 DSL circuit card

PEC Description Application

NTNY52AA ADSL combo 8+8 line card UA-AAL1 and

UA-IP solutions

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78 Functional description

NTNY52AA ADSL combo 8+8 line card The ADSL combo 8+8 (NTNY52AA) line card terminates eight fully compliant ADSL subscriber loops. Each loop interface has a splitter circuit to separate or join the lifeline voice service with the value-added ATM data cell traffic for the subscriber. The data traffic routes to the ATM common equipment MG 9000 shelf. The line card contains no voice or data traffic. The NTNY52AA line card contains four voice circuits and four data circuits.

The 8+8 combo card is supported in UA-AAL1 and UA-AAL-5 (IP over ATM), though it is not supported in an MG 9000 with GigE DCC cards.

The ADSL line card

is a voice and data interface to the subscriber loop

terminates eight subscriber loop pairs for analog voice telephone service and standard compliant ADSL ATM data services

uses an onboard ring generator circuit that provides the ringing for the 8 POTS circuits. The ringing generator provides 10VA at 100 ± 7 Vrms

uses an onboard PUPS

The 8+8 combo line card is provisioned on the master MG 9000 shelf and is provisioned in any open line card slot 2-9 and 14-21. The number of 8+8 combo line cards provisioned depends on the number of ITX cards required for the MG 9000 node. 8+8 combo line cards are provisioned from the left side of the MG 9000 shelf to the right side of the shelf.

Line loop resistance capabilities The line loop resistance capabilities of the NTNY52AA are summarized as follows:

Maximum total loop resistance (including telephone set) to detect an off-hook threshold of 21 mA: 1900 Ohms. This is based on the following: a normal talk battery range of -49 to -53.5 V a total loop resistance of 1900 Ohms, including telephone set

(assuming a 500-type residential telephone set with 21 mA loop current) a ringing capability versus loop length is a fixed sine wave

amplitude of 100 ± 7 Vrms

Maximum loop resistance (excluding telephone set) to ring a 5 REN load with a minimum of 40 Vrms: 1400 Ohms. This is based on the following:

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a minimum ringing voltage of the ringing generator of 93 Vrms, an LSSGR requirement of a minimum 40 Vrms delivered to a 5

REN load, and a 5 REN load defined as 1386 Ohms in series with a 40 mF

capacitor.

This means the maximum loop resistance, excluding the telephone set, but including all premises wiring between the operating company demarcation point and the telephone set, is 1400 Ohms. This resistance equates to a loop of 17,000 ft with 26 AWG wire.

Additional ringing information

By default the MG 9000 uses scheduled ringing. Scheduled ringing allows six lines to be in the ringing state at any given time. This is accomplished by assigning the ring start to the next available ring slot. As shown in the following figure, two lines are in the power ringing state, while the other four are in the silent state. This figures assumes a normal 2 seconds (s) On, 4 s Off ringing pattern.

Scheduled ringing applies to all line cards except the SAA-12 line card.

Carrier VoIP Nortel MG 9000 Fundamentals NN10011-111 11.02 Standard 4 July 2008 Copyright © 2007, 2008 Nortel Networks

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80 Functional description

Figure 30 Scheduled ringing diagram

Carrier VoIP Nortel MG 9000 Fundamentals NN10011-111 11.02 Standard 4 July 2008 Copyright © 2007, 2008 Nortel Networks

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