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:  
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.  
Americas Headquarters:  
Cisco Systems, Inc., 170 West Tasman Drive, San Jose, CA 95134-1706 USA  
 
 
Connecting Cisco Voice Network Modules to the Network  
60-Channel High-Density Voice Network Module  
Note  
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  
V0  
EN  
Figure 4  
2-Slot 8-Channel High-Density Voice Network Module (NM-HD-2V)  
NM-HD  
-2V  
V1  
V0  
EN  
Figure 5  
2-Slot 48-Channel High-Density Voice Network Module (NM-HD-2VE)  
NM-HD  
-2VE  
V1  
V0  
EN  
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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Connecting Cisco Voice Network Modules to the Network  
60-Channel High-Density Voice Network Module  
Figure 6  
60-Channel High-Density Voice Network Module (NM-HDV)  
NM-HDV  
V0  
BANK 4 BANK 3 BANK 2 BANK 1 BANK 0  
EH  
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.  
Connecting Cisco Voice Network Modules to the Network  
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Connecting Cisco Voice Network Modules to the Network  
60-Channel High-Density Voice Network Module  
Figure 7  
PVDM Slot Locations  
4
3
2
1
0
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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Connecting Cisco Voice Network Modules to the Network  
60-Channel High-Density Voice Network Module  
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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Connecting Cisco Voice Network Modules to the Network  
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  
2V  
V1  
V0  
EN  
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  
V0  
EH  
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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Connecting Cisco Voice Network Modules to the Network  
IP Communications High-Density Digital Voice or Fax Network Module  
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  
V0  
EN  
PVDM 3 PVDM 2  
PVDM 1 PVDM 0  
Figure 14  
NM-HDV2-1T1/E1  
See Manual before Installation.  
NM-HDV2-1T1/E1  
V0  
AL  
LP  
CD  
EN  
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  
V0  
AL  
LP  
CD  
AL  
LP  
CD  
EN  
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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IP Communications High-Density Digital Voice or Fax Network Module  
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
4
4-8  
PVDM2-16  
PVDM2-32  
PVDM2-48  
PVDM2-64  
6
8
6-16  
12  
18  
24  
16  
24  
32  
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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Connecting Cisco Voice Network Modules to the Network  
IP Communications High-Density Digital Voice or Fax Network Module  
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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Connecting Cisco Voice Network Modules to the Network  
IP Communications High-Density Digital Voice or Fax Network Module  
Figure 16  
NM-HDV2-2T1/E1 Jumpers Configured for Normal Mode  
J6  
J7  
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.  
Connecting Cisco Voice Network Modules to the Network  
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Connecting Cisco Voice Network Modules to the Network  
IP Communications High-Density Digital Voice or Fax Network Module  
Figure 17  
PVDM2 Module Slot Locations  
3
2
1
0
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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Connecting Cisco Voice Network Modules to the Network  
IP Communications High-Density Digital Voice or Fax Network Module  
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  
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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Connecting Cisco Voice Network Modules to the Network  
IP Communications High-Density Digital Voice or Fax Network Module  
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.  
Connecting Cisco Voice Network Modules to the Network  
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Connecting Cisco Voice Network Modules to the Network  
Related Documents  
Figure 21  
NM-HDV2 Network Module LEDs  
See Manual before Installation.  
NM-HDV2  
V0  
EN  
PVDM 1 PVDM 0  
PVDM 3 PVDM 2  
PVDM 2  
LED  
PVDM 1  
LED  
ENABLE  
LED  
PVDM 3  
LED  
PVDM 0  
LED  
The NM-HDV2-1T1/E1 and NM-HDV2-2T1/E1 network modules have LEDs monitoring the alarm  
(AL), loopback (LP), and carrier detection (CD) conditions of the built-in T1/E1 ports. (See Figure 22.)  
Figure 22  
NM-HDV2-2T1/E1 LEDs  
See Manual before Installation.  
NM-HDV2-2T1/E1  
V0  
AL  
LP  
CD  
AL  
LP  
CD  
EN  
PVDM 1 PVDM 0  
PVDM 3 PVDM 2  
CTRLR T1/E1 1  
CTRLR T1/E1 0  
PVDM 1  
LED  
ENABLE  
LED  
PVDM 2  
LED  
Alarm,  
Alarm,  
PVDM 0  
LED  
loopback, and  
carrier detect  
LEDs  
loopback, and  
carrier detect  
LEDs  
PVDM 3  
LED  
Related Documents  
For additional information, see the following documents and resources.  
Related Topic  
Document Title  
Regulatory compliance and safety  
information  
Cisco Network Modules and Interface Cards Regulatory Compliance and Safety  
Information  
Cisco IOS software website and reference Cisco IOS Software  
documentation  
Connecting Cisco Voice Network Modules to the Network  
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Connecting Cisco Voice Network Modules to the Network  
Obtaining Documentation, Obtaining Support, and Security Guidelines  
Obtaining Documentation, Obtaining Support, and Security  
Guidelines  
For information on obtaining documentation, obtaining support, providing documentation feedback,  
security guidelines, and also recommended aliases and general Cisco documents, see the monthly  
What’s New in Cisco Product Documentation, which also lists all new and revised Cisco technical  
documentation, at:  
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Obtaining Documentation, Obtaining Support, and Security Guidelines  
Connecting Cisco Voice Network Modules to the Network  
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