This document describes changes to Cisco IOS ® Software feature licenses on the Cisco ® 7200 Series Routers and Cisco 7301 Router. These changes are effective beginning March 20, 2010, for Cisco IOS Software Release 15.0M and later.
Starting with Cisco IOS Software Release 15.0M, only the extended maintenance releases, 15.xM, will be published for the Cisco 7200 Series Routers. The short lived feature releases, 15.xT, will not be published for 7200 Series and the 7301 router. This means that releases 15.1(1)T, 15.1(2)T, and subsequent 15.x(x)T releases will not be published for the 7200 Series and the 7301.
For additional information Cisco IOS Release 15.0M, please see the release notes at: http://www.cisco.com/en/US/docs/ios/15_0/release/notes/150MREQS.html