Cisco Systems Network Hardware OL 12812 01 User Manual

Connecting Cisco Voice Network Modules to the

Network

Revised: May 1, 2008, OL-12812-01

This guide describes how to connect Cisco voice network modules to your network. It contains the

following sections:

•

V o ice Network Modules, page 1

2- and 4-Channel V o ice Network Modules, page 2

4-, 8-, and 48-Channel High-Density V o ice Network Modules, page 2

60-Channel High-Density V o ice Network Module, page 3

V o ice Network Module LEDs, page 7

IP Communications High-Density Digital V o ice or Fax Network Module, page 8

Related Documents, page 16

Obtaining Documentation, Obtaining Support, and Security Guidelines, page 17

Voice Network Modules

The voice functionality built into Cisco IOS software enables modular access routers to carry voice

traffic, such as telephone calls and faxes, as Voice over IP (VoIP) simultaneously with data traffic over

LANs, MANs, and WANs. Voice network modules convert telephone voice signals into a form that can

be transmitted over an IP network.

Voice network modules convert telephone voice signals into a form that can be transmitted over an IP

network. These modules have one or two slots for installing supported interface cards. Voice interface

cards (VICs) or voice/WAN interface cards (VWICs) installed in the voice network module provide

physical connections to the telephony equipment or network, and are connected using the appropriate

cables.

You can install one voice interface card in a 1-slot voice network module, and two voice interface cards

in a 2-slot module.

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Connecting Cisco Voice Network Modules to the Network

60-Channel High-Density Voice Network Module

Note

For the NM-HD-1V, NM-HD-2V, and NM-DS-2VE network modules, DSPs are on-board and are not

field-replaceable units (FRUs).

The NM-HD-1V, NM-HD-2V, and NM-HD-2VE network modules replace the NM-1V and NM-2V

network modules. The NM-1V and NM-2V network modules are still available for use on Cisco 2600

series, Cisco 3600 series, and Cisco 3700 series routers.

Figure 3

1-Slot 4-Channel High-Density Network Module (NM-HD-1V)

NM-HD

-1V

Figure 4

2-Slot 8-Channel High-Density Voice Network Module (NM-HD-2V)

NM-HD

-2V

Figure 5

2-Slot 48-Channel High-Density Voice Network Module (NM-HD-2VE)

NM-HD

-2VE

60-Channel High-Density Voice Network Module

This section describes the 60-channel high-density voice (HDV) network module, shown in Figure 6.

When used in conjunction with T1/E1 multiflex trunk interface cards and packet voice digital signal

processor modules (PVDMs), this module is also called a digital T1/E1 packet voice trunk network

module.

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60-Channel High-Density Voice Network Module

Figure 6

60-Channel High-Density Voice Network Module (NM-HDV)

NM-HDV

BANK 4 BANK 3 BANK 2 BANK 1 BANK 0

The 60-channel HDV network module converts voice and fax into IP packets or frames that can be

transmitted as VoIP over a variety of transport technologies (channelized T1/E1, Frame Relay,

Asynchronous Transfer Mode (ATM), and others). The number of channels supported depends on the

number of PVDMs installed:

•

Up to 6 channels per PVDM (30 channels for cards with 5 PVDMs) for high-complexity vocoders

that support the following compression algorithms: G.711, G.726, G.729, G.723.1, G.728, and Fax

Relay

•

Up to 12 channels per PVDM (60 channels for cards with 5 PVDMs) for medium-complexity

vocoders that support the following compression algorithms: G.711, G.726, G.729a, and Fax Relay

Both a 60-channel HDV network module and a voice interface card (VIC) are required to connect to the

public switched telephone network (PSTN) or a PBX. One VIC (providing one or two T1/E1 line

interfaces) can be installed in the HDV network module. Currently, only the 1- and 2-port T1/E1

multiflex trunk interface cards (VWIC-1MFT-T1, VWIC-2MFT-T1, and VWIC-2MFT-T1-DI) are

supported using channel-associated signaling (CAS). In Cisco 3620 and Cisco 3640 routers, at least one

other network module or WAN interface card (WIC) must be installed in the router to provide the

connection to the IP LAN or WAN. In Cisco 3660 routers, a network module is required for WAN access

or a direct connection is required for LAN access. In Cisco 2600 series routers, a WIC is required for

WAN access or a direct connection is required for LAN access.

Packet Voice DSP Modules

The HDV network module contains five 72-pin SIMM sockets or banks for packet voice DSP modules

(PVDMs), numbered 0 through 4. (See Figure 7.) Each socket can be filled with a single 72-pin PVDM.

The PVDMs must be installed starting from slot 0.

Note

PVDM and PVDM2 modules are not interchangeable. Use PVDM modules with the NM-HDV network

module only, and use PVDM2 modules with the NM-HDV2 network module only.

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Figure 7

PVDM Slot Locations

PVDM slots

PVDM Orientation

PVDMs are manufactured with a polarization notch to ensure proper orientation and alignment holes to

ensure proper positioning. Figure 8 shows the polarization notch and alignment holes on a PVDM card.

PVDM cards are installed with the connector edge down, the polarization notch near the front of the

chassis, and the component side facing the right side of the chassis.

Caution

To avoid damaging ESD-sensitive components, observe all ESD precautions. To avoid damaging the

HDV network module, avoid using excessive force when you remove or replace PVDMs.

Figure 8

PVDM Orientation

Alignment holes

Connector edge

Polarization notch

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Removing PVDMs

To remove PVDMs, follow these steps:

Step 1

Find the PVDM sockets on the HDV network module. (See Figure 7.)

Caution

Handle PVDMs by the card edges only. PVDMs are ESD-sensitive components and can be damaged by

mishandling.

Step 2

Remove one PVDM at a time, beginning with the PVDM in bank 4. To lift the PVDM out of its socket,

pull the locking spring clips on both sides outward and tilt the PVDM toward the right side of the chassis,

free of the clips. (See Figure 9.)

Figure 9

Removing PVDMs

Top view

Front of chassis

2. Push the top of the

PVDM forward and down.

PVDM

polarization

notch

1. Pull the locking spring clips outward.

Step 3

Step 4

Hold the PVDM by the edges with your thumb and index finger and lift it out of the socket. Place the

removed PVDM in an antistatic bag to protect it from ESD damage.

Repeat Step 2 and Step 3 for each PVDM.

Installing PVDMs

To install PVDMs, follow these steps:

Step 1

Find the PVDM sockets on the HDV network module. (See Figure 7.)

Caution

Handle PVDMs by the card edges only. PVDMs are ESD-sensitive components and can be damaged by

mishandling.

Step 2

Hold the PVDM with the polarization notch on the right, near the front of the chassis, and the component

side away from you, with the connector edge at the bottom. (See Figure 8.)

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Voice Network Module LEDs

Step 3

Step 4

Beginning with bank 0, insert the PVDM into the connector slot at an angle, tilted toward the right side

of the chassis. Align the PVDM in a vertical position (see Figure 10) by using the minimum amount of

force required. When the PVDM is properly seated, the socket guide posts fit through the alignment

holes, and the connector springs click into place.

Ensure that each PVDM is straight and that the alignment holes (as shown in Figure 9) line up with the

plastic guides on the socket.

Figure 10

Installing PVDMs

View from front of board

1. Insert the PVDM into the socket

at an angle from vertical.

2. Push the top of the PVDM

down and back.

3. The socket guide posts fit through

the holes in the PVDM.

4. The locking springs clip the back

of the PVDM.

Caution

Step 5

It is normal to feel some resistance, but do not use excessive force on the PVDM and do not touch the

surface components.

Repeat Step 2 through Step 4 for each PVDM.

Voice Network Module LEDs

All network modules have an enable (EN) LED. This LED indicates that the module has passed its

self-tests and is available to the router. The following network modules have no additional LEDs. (See

Figure 11 for a sample faceplate.)

•

NM-1V

NM-2V

NM-HD-1V

NM-HD-2V

NM-HD-2VE

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IP Communications High-Density Digital Voice or Fax Network Module

Figure 11

Voice Network Module LED

Module

screw

VOICE

Module

screw

Enable

LED

HDV Network Module LEDs

High-density network modules have an enable (EN) LED, and five LEDs for the PVDM banks,

numbered 0 through 4. The enable LED indicates that the module has passed its self-tests and is available

to the router. The BANK 0 through BANK 4 LEDs indicate the current operating condition of the

PVDMs installed on the card. (See Figure 12.) If the BANK LEDs do not come on after initial

installation and configuration, check that the PVDMs are properly seated in their slots.

Figure 12

HDV Network Module LEDs

NM-HDV

BANK 4 BANK 3 BANK 2 BANK 1 BANK 0

BANK 4

LED

BANK 2

LED

BANK 0

LED

ENABLE

LED

BANK 3

LED

BANK 1

LED

IP Communications High-Density Digital Voice or Fax Network

Module

This section describes the IP communications high-density digital voice or fax (NM-HDV2) network

module. This module is available in three base-board stock-keeping units (SKUs):

•

NM-HDV2, with no built-in T1/E1 ports, shown in Figure 13

NM-HDV2-1T1/E1, with one built-in T1/E1 port, shown in Figure 14

NM-HDV2-2T1/E1, with two built-in T1/E1 ports, shown in Figure 15

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These three base-board SKUs also include a single VIC or VWIC slot for Foreign Exchange Station

(FXS), Foreign Exchange Office (FXO) or centralized automated message accounting trunk protocol

(CAMA), receive and transmit (E&M), Direct Inward Dial (DID), Basic Rate Interface (BRI), or E1/T1

interface cards.

Figure 13

NM-HDV2

See Manual before Installation.

NM-HDV2

PVDM 3 PVDM 2

PVDM 1 PVDM 0

Figure 14

NM-HDV2-1T1/E1

See Manual before Installation.

NM-HDV2-1T1/E1

PVDM 1 PVDM 0

PVDM 3 PVDM 2

CTRLR T1/E1 0

Figure 15

NM-HDV2-2T1/E1

See Manual before Installation.

NM-HDV2-2T1/E1

PVDM 1 PVDM 0

PVDM 3 PVDM 2

CTRLR T1/E1 1

CTRLR T1/E1 0

The NM-HDV2 network module converts voice and fax into IP packets or frames that can be transmitted

as VoIP over a variety of transport technologies (channelized T1, Frame Relay, Asynchronous Transfer

Mode [ATM], and others).

Packet Fax or Voice DSP Modules

The packet fax or voice digital signal processor (DSP) module (PVDM2) is available in five

stock-keeping units (SKUs):

Table 1

PVDM2 Module SKUs

Module Name Description

PVDM2-8

8-channel packet fax or voice DSP module

16-channel packet fax or voice DSP module

PVDM2-16

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Table 1

PVDM2 Module SKUs

Module Name Description

PVDM2-32

PVDM2-48

PVDM2-64

32-channel packet fax or voice DSP module

48-channel packet fax or voice DSP module

64-channel packet fax or voice DSP module

You can install up to four PVDM2 modules on all of the NM-HDV2 SKUs. The number of channels

supported depends on the number and density-type of PVDM2 modules installed.

Table 2

Channels Per PVDM2 Module Type

Max Channels for High Max Channels for

Range of Channels for

Flexi Complexity³

Module Name

PVDM2-8

Complexity¹

Medium Complexity²

4-8

PVDM2-16

PVDM2-32

PVDM2-48

PVDM2-64

6-16

12-32

18-48

24-64

1. High-complexity vocoders supported: G.711, G.726, G.729, G.723.1, G.728, and Fax Relay.

2. Medium-complexity vocoders supported: G.711, G.726, G.729a, and Fax Relay.

3. Flexi vocoders supported: G.711, G.726, G.729, G.723.1, G.728, and Fax Relay (number of channels depends on codec

selected).

Note

PVDM and PVDM2 modules are not interchangeable. Use PVDM modules with the NM-HDV network

module only, and use PVDM2 modules with the NM-HDV2 network module only.

When used with PVDM2 modules and either the built-in T1/E1 ports or the T1/E1 voice or WAN

interface cards (VWIC), the NM-HDV2 network module provides the interface to the PBX, the PSTN,

or WAN. The following VWICs are supported:

•

VWIC-1MFT-T1

VWIC-2MFT-T1

VWIC-2MFT-T1-DI

VWIC-1MFT-E1

VWIC-2MFT-E1

VWIC-2MFT-E1-DI

VWIC-1MFT-G703

VWIC-2MFT-G703

When used with PVDM2 modules and next-generation analog or BRI voice interface cards (VIC2), the

NM-HDV2 network module provides the interface to telephony equipment (PBX, key systems,

telephones, and fax machines) and to the PSTN. The following VICs are supported:

•

VIC-2DID

VIC-1J1

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•

VIC-4FXS/DID (DID feature not supported)

VIC2-2FXO

VIC2-4FXO

VIC2-2FXS

VIC2-2E/M

VIC2-2BRI-NT/TE

Configuring E1 Ports for Normal or Wetting Current Mode

On the NM-HDV2-1T1/E1 and NM-HDV2-2T1/E1 network modules there is a jumper block for each

built-in T1/E1 port that controls whether the port supports normal or wetting current mode. Wetting

current is a small amount of electrical current (60 to 140 milliamps) sent from the central office to the

card to prevent the corrosion of electrical contacts in the module’s network connection. Depending on

how your E1 line is provisioned, you might have to change the jumper setting on the network module to

allow proper operation.

The jumper blocks are identified on the printed circuit board of the NM-HDV2-1T1/E1 and

NM-HDV2-2T1/E1 network modules as J6 and J7. (See Figure 16.) J6 is the jumper block for T1/E1

controller 1 and J7 is the jumper block for T1/E1 controller 0. The pins on each jumper block are

numbered 1 to 3 from right to left.

•

To configure an E1 port for normal mode, set the jumper to pins 2 and 3.

To configure an E1 port for wetting current mode, set the jumper to pins 1 and 2.

Figure 16 shows the jumper block configured for normal mode, with the jumper set to pins 2 and 3.

Tip

If you are unsure whether your E1 line is configured for normal or wetting current mode, check with

your provider. You can also use the show controllers E1 command to look for line code violations and

path code violations. These errors can indicate that the jumper is not set correctly.

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Figure 16

NM-HDV2-2T1/E1 Jumpers Configured for Normal Mode

Pin 3 Pin 2

Pin 1

Installing PVDM2 Modules

The NM-HDV2 network modules contain four 80-pin SIMM sockets for PVDM2 modules, numbered 0

through 3. (See Figure 17.) Each socket can be filled with a single 80-pin PVDM2 module.

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Figure 17

PVDM2 Module Slot Locations

PVDM2 Module Orientation

PVDM2 modules are manufactured with a polarization notch to ensure proper orientation, and alignment

holes to ensure proper positioning. Figure 18 shows the polarization notch and alignment holes on a

PVDM2 module. PVDM2 modules are installed with the connector edge down, the polarization notch

near the back of the chassis.

Caution

To avoid damaging ESD-sensitive components, observe all ESD precautions. To avoid damaging the

NM-HDV2 network module, avoid using excessive force when you remove or replace PVDM2 modules.

Figure 18

PVDM2 Module Orientation

Alignment holes

Connector edge

Polarization notch

Alignment notch

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Removing PVDM2 Modules

To remove PVDM2 modules, follow these steps:

Step 1

Find the PVDM2 sockets on the NM-HDV2 network module. (See Figure 17.)

Caution

Handle PVDM2 modules by the card edges only. PVDM2 modules are ESD-sensitive components and

can be damaged by mishandling.

Step 2

Remove one PVDM2 module at a time. To make your job easier, if you have a PVDM2 module in both

socket 0 and socket 1, remove PVDM 1 before removing PVDM 0. Similarly, remove PVDM 3 before

removing PVDM 2. To lift the PVDM2 module out of its socket, pull the locking spring clips on both

sides outward and tilt the PVDM2 module toward the left side of the chassis, free of the clips. (See

Figure 19.)

Figure 19

Removing PVDM2 Modules

Top view

Front of chassis

2. Push the top of the

PVDM forward and down.

PVDM

polarization

notch

1. Pull the locking spring clips outward.

Step 3

Step 4

Hold the PVDM2 module by the edges with your thumb and index finger and lift it out of the socket.

Place the removed PVDM2 module in an antistatic bag to protect it from ESD damage.

Repeat Step 2 and Step 3 for each PVDM2 module.

Installing PVDM2 Modules

To install PVDM2 modules, follow these steps:

Step 1

Find the PVDM2 sockets on the NM-HDV2 network module. (See Figure 17.)

Caution

Handle PVDM2 modules by the card edges only. PVDM2 modules are ESD-sensitive components and

can be damaged by mishandling.

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Step 2

Step 3

Hold the PVDM2 module with the polarization notch on the right, near the back of the chassis, with the

connector edge at the bottom. (See Figure 18.)

Again, to make your job easier, begin with socket 0, then socket 1, or socket 2, then socket 3. Insert the

PVDM2 module into the connector slot at an angle, tilted toward the left side of the chassis. Align the

PVDM2 module in a vertical position (see Figure 20), by using the minimum amount of force required.

When the PVDM2 module is properly seated, the socket guide posts fit through the alignment holes, and

the connector springs click into place.

Step 4

Ensure that each PVDM2 module is straight and that the alignment holes (as shown in Figure 19) line

up with the plastic guides on the socket.

Note

Be sure to align the alignment notch in the bottom of the PVDM2 module with the rib in the

80-pin socket.

Figure 20

Installing PVDM2 Modules

View from front of board

1. Insert the PVDM2 into the socket

at an angle from vertical.

2. Push the top of the PVDM2

down and back.

3. The socket guide posts fit through

the holes in the PVDM2.

4. The locking springs clip the back

of the PVDM2.

Caution

Step 5

It is normal to feel some resistance, but do not use excessive force on the PVDM2 module, and do not

touch the surface components.

Repeat Step 2 through Step 4 for each PVDM2 module.

NM-HDV2 Network Module LEDs

IP communications high-density digital voice or fax (NM-HDV2) network modules have an enable (EN)

LED, and four LEDs for the PVDM2 modules, numbered 0 through 3. The enable LED indicates that the

module has passed its self-tests and is available to the router. The PVDM 0 through PVDM 3 LEDs

indicate the current operating condition of the PVDM2 modules installed on the card. (See Figure 21.)

If the PVDM LEDs are not green after initial installation and configuration, check that the PVDM2

modules are properly seated in their slots.

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