Cisco Cisco IOS Software Release 12.3(11)T

Copyright © 2004 Cisco Systems, Inc. All rights reserved.

The IP Communications Voice/Fax Network Module feature provides the ability to directly connect the 
PSTN and legacy telephony equipment to Cisco 2600XM series, Cisco 2691, Cisco 3600 series, and 
Cisco 3700 series multiservice routers, enabling applications such as IP telephony, toll bypass, and full 
gateway integration. The voice WAN interface cards (VWICs) supported by the new network modules 
include 2- and 4-port FXS; 2- and 4-port FXO; 2-port DID, E&M, and BRI (S/T); and 1- and 2-port 
T1/E1. 

Use Cisco Feature Navigator to find information about platform support and Cisco IOS software image 
support. Access Cisco Feature Navigator at 

. You must have an account on 

Cisco.com. If you do not have an account or have forgotten your username or password, click Cancel at 
the login dialog box and follow the instructions that appear. 

12.2(15)ZJ

This feature was introduced.

12.3(4)T

This feature was integrated into Cisco IOS Release 12.3(4)T.

12.3(11)T2

The groundstart auto-tip command was added to the command-line 
interface and the feature was integrated into Cisco IOS 
Release 12.3(11)T2. This new command is not supported on the 
Cisco 1700 series platform.