Cisco CISCO2650 - 2650 Router Hardware Installation Manual page 143

Connecting 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 (see
page 1-5
(VWICs) installed in the voice network module provide physical connections to the telephony equipment
or network, and are connected using the appropriate cables. See the
Installation Guide
You can install one voice interface card in a 1-slot voice network module, and two voice interface cards
in a 2-slot module. For information on installing voice interface cards into a network module, see the
"Installing Cisco Interface Cards in 1- or 2-Slot Network Modules" section on page
This chapter contains the following sections:
•
•
•
•
•
To determine whether your router supports a specific network module, see
Tip
2- and 4-Channel Voice Network Modules
This section describes the following modules:
•
•
For information on the Cisco interface cards supported on these voice network modules, see
on page
OL-2485-20
and Table 1-2 on page
for more information.
2- and 4-Channel Voice Network Modules, page 8-1
4-, 8-, and 48-Channel High-Density Voice Network Modules, page 8-2
60-Channel High-Density Voice Network Module, page 8-3
Voice Network Module LEDs, page 8-8
IP Communications High-Density Digital Voice or Fax Network Module, page 8-9
1-slot 2-channel voice network module (NM-1V) (see
2-slot 4-channel voice network module (NM-2V) (see
1-8.
1-8). Voice interface cards (VICs) or voice/WAN interface cards
Cisco Network Modules Hardware Installation Guide
C H A P T E R
Cisco Interface Cards Hardware
2-24.
Table 1-6 on page
Figure 8-1)
Figure 8-2)
8
Table 1-1 on
1-16.
Table 1-2
8-1