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Voice Interface Cards (VICs)
To install a voice network module, slide it into a slot in the router chassis (Figure 3). Use a number 1
Phillips or small flat-blade screwdriver to fasten the module’s mounting screws.
Figure 3 Installing a Voice Network Module in a Router
3
2E
2W W1
1
Voice Interface Cards (VICs)
B1
B2
ACT
LNK
NT1
SEE MANUAL BEFORE INSTALLATION
ETHERNET 1 ETHERNET 0
Voice interface cards install in slots in the voice network module, and provide connections to the
telephone equipment or network. Figure 4 shows a typical VIC.
Figure 4 Voice Interface Card
USE
VIC
E&M IN
BRI
NT1
ACT
LNK
ACT
VOICE
4V
V1
VIC ports
SERIAL
WO
IN USE
1 0
SEE MANUAL BEFORE INSTALLATION
Module
INPUT 100-240VAC 50/60HZ 3.0-1.5 AMPS
Router
There are three types of VIC interface:
• An FXS (foreign exchange station) interface connects directly to a standard telephone, fax
machine, or similar device. The FXS VIC interface supplies ringing voltage, dial tone, and
similar signals to the station. Ports on this VIC are color-coded gray.
• An FXO (foreign exchange office) interface connects local calls to a public switched telephone
network central office, or to a PBX that does not support E&M signaling. This is the interface a
standard telephone provides. Ports on this VIC are color-coded pink.
• E&M (ear and mouth) is a signaling technique for two-wire and four-wire telephone and trunk
interfaces. The E&M VIC connects remote calls from an IP network to a PBX for local
distribution. Ports on this VIC are color-coded brown.
Each VIC provides two ports. You need one VIC port for each voice connection.
You can install one VIC (two voice ports) in a one-slot voice network module, and two VICs (four
voice ports) in a two-slot voice network module.
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V0
EN
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H10841
Voice over IP Quick Start Guide 5