Cisco Cisco IOS Software Release 12.2(4)T

This document was originally produced for Cisco IOS Release 12.2(4)T. This feature has been updated 
in subsequent releases, and more recent documentation is available. 

If you are using Cisco IOS Release 12.2(4)T or higher, refer to the following documentation in the 
Cisco CallManager and Cisco IOS Interoperability Configuration Guide, Cisco IOS Voice 
Configuration Library, Release 12.3: 

This document describes the additional functionality and platforms offered by the Cisco 2600 and 3600 
Routers Media Gateway Control Protocol (MGCP) Voice Gateway Interoperability with Cisco 
CallManager feature in Cisco IOS Release 12.2(4)T. 

This document includes the following sections:

12.1(3)T

This feature was introduced with Cisco CallManager Version 3.0 and the 
Cisco Voice Gateway 200 (VG200). 

12.2(2)XA

Support was added for Cisco CallManager Version 3.0(8), and Cisco 2600 
series and Cisco 3600 series routers.

12.2(4)T

This feature was integrated into Cisco IOS Release 12.2(4)T.