Cisco Cisco IOS Software Release 12.2(11)YT

Cisco IOS Telephony Service (ITS) V2.1 introduces support for the ITU-T H.450 standard for 
consultative call transfer and call forwarding, four additional languages (French, German, Italian, and 
Spanish), other telephony features, and the Cisco IP Phone Expansion Module 7914. 

This document discusses new features only. For information on ITS installation and basic configuration, 
refer to Cisco IOS Telephony Service Version 2.01.

12.1(5)YD

Version 1.0

ITS was introduced on the Cisco 2600 series, Cisco 3600 
series, and Cisco IAD2420.

12.2(2)XT

Version 2.0

Additional IP phone features were added. ITS V2.0 was 
implemented on the Cisco 1750 and Cisco 1751.

12.2(8)T

—

ITS was integrated into Cisco IOS Release 12.2(8)T and 
implemented on the Cisco 3725 and Cisco 3745.

12.2(8)T1

—

ITS was implemented on the Cisco 2600-XM and Cisco 2691.

12.2(11)T

Version 2.01

ITS was integrated into Cisco IOS Release 12.2(11)T. Voice 
ports for each IP phone, top-line description for the Cisco IP 
Phone 7960 and Cisco IP Phone 7940, and ATA-186 support 
were added. Support for the Cisco 1760 was added and support 
for the Cisco 1750 was removed.

12.2(11)YT

Version 2.1

Support was added for consultative transfer using the ITU-T 
H.450.2 standard, call forwarding using the ITU-T H.450.3 
standard, four additional languages for phone displays and call 
progress tones, eXtensible Markup Language (XML) scripting 
for administrative customization, Cisco IP Phone Expansion 
Module 7914, and other telephony features.

12.2(11)YT1

Version 2.1

The reset command was modified and the restart command 
was introduced to provide more options when rebooting IP 
phones after configuration updates.