IP Phone Release 6.2 Bulletin

Cisco IP Phone firmware images now contain a
Cisco digital signature to provide authentication for
improved security. Once firmware version 6.2 is
loaded onto a phone, all subsequent firmware
versions will be checked for authenticity.

Firmware images prior to release 5.0 do not contain
a Cisco digital signature and therefore once version
6.2 is loaded onto a phone, all prior firmware
releases will be rejected. Only versions 5.0 or
greater will be accpected as it contains a Cisco 
digital signature.

Bugs Fixed SIP in 6.2:


CSCed40049 SIPPhone: CANCEL message not formatted properly after 180 received
CSCed47721 Branch ID is not compliant to RFC3261
CSCed21171 SIP IP Phone resets rtp session when it receives sip re-invite


