Cisco IOS SIP Features Roadmap

Version 2

    The following url will provide you with a list of SIP features begining IOS 12.3 and later, as well the location of the feature documentation

     

     

    http://www.cisco.com/en/US/docs/ios/voice/sip/configuration/guide/sip_cg-roadmap_ps6441_TSD_Products_Configuration_Guide_Chapter.html