Configuring Voice Ports
Configuring Digital Voice Ports
VC-56
Cisco IOS Voice, Video, and Fax Configuration Guide
Preparing Information to Configure Digital Voice Ports
Gather the following information about the telephony network connection that the voice port will be
making:
• Line interface: T1 or E1
• Signaling interface: FXO, FXS, or E&M. If the interfaces are Primary Rate Interface (PRI) or BRI,
see the “Configuring ISDN Interfaces for Voice” chapter in this configuration guide and Cisco IOS
Terminal Services Configuration Guide.
• Line coding: AMI or B8ZS for T1, and AMI or HDB3 for E1
• Framing format: SF (D4) or ESF for T1, and CRC4 or no-CRC4 for E1
• Number of channels
Table 8 describes voice-port hardware configurations for various platforms. After the controllers have
been configured, the show voice port summary command can also be used to determine available voice
port numbers. If the show voice port command and a specific port number is entered, the default
voice-port configuration for that port displays.
Table 8 Digital Voice Slot/Port Designations
Router Platform Voice Hardware Slot Number Port Number
Cisco 2600 series Digital T1/E1 Packet Voice
Trunk Network Module
(NM-HDV with VWIC-1MFT
or VWIC-2MFT)
One network module can be
installed in a Cisco 2600 series
router.
slot is the router
location of the voice
module.
1
port is the VWIC
location in the
network module.
0 to 1
Cisco 3600 series Digital T1/E1 Packet Voice
Trunk Network Module
(NM-HDV with VWIC-1MFT
or VWIC-2MFT)
One network module can be
installed in a Cisco 3620
router. A Cisco 3640 router
can support threemodules, and
as many as six can be installed
in a Cisco 3660 router.
slot is the router
location of the voice
module.
3620: 0 to 1
3640: 0 to 3
3660: 0 to 5
port is the VWIC
location in the
network module.
0 to 1
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