[cisco-voip] 7921G sip support

[Dane Newman]

http://www.cisco.com/en/US/prod/collateral/voicesw/ps6788/phones/ps379/prod_qas0900aecd80601788.html

If you scroll down it reads

 *Q.* Does the Cisco Unified Wireless IP Phone 7921G support SIP?
A. No, this phone supports only the SCCP protocol. Support for SIP protocol
will come later.

Has later come yet?  if so how do I upgrade the firmware to support sip?
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