Cisco Cisco IOS Software Release 12.4(4)T

The information in this document applies only to the Secure Communication Between IP-STE Endpoint 
and Line-Side STE Endpoint feature for Cisco IOS Releases 12.4(4)T and 12.4(9)T. This feature has 
been upgraded and released as the Cisco V.150.1 Minimum Essential Requirements feature beginning in 
Cisco IOS Release 15.1(4)M (dated March 25, 2011) and later releases. For detailed information about 
the upgraded feature, see the 

document.

The Secure Communication Between IP-STE Endpoint and Line-Side STE Endpoint feature provides 
the following Cisco IOS gateway capabilities:

Support for establishing secure calls between gateway-attached secure terminal equipment (STE) 
devices and IP-STE devices

Ability to configure modem transport methods 

Ability to configure V.150.1 modem relay parameters

Your Cisco IOS software release may not support all of the features documented in this module. For the 
latest feature information and caveats, see the release notes for your platform and software release. To 
reach links to specific feature documentation in this module and to see a list of the releases in which each 
feature is supported, use the 

.

Use Cisco Feature Navigator to find information about platform support and Cisco IOS and Catalyst OS 
software image support. To access Cisco Feature Navigator, go to 

. An 

account on Cisco.com is not required.