Content
Solution
In the CANCEL message, the PBX has to send the "reason" header correctly according to RFC 3326 ("The Reason Header Field for the Session Initiation Protocol") in order to communicate to the phone that somebody else has picked up the call (this will work only as of firmware Version 7):
CANCEL sip:... CSeq: 8044 CANCEL .. Reason: SIP;cause=200;text="Call completed elsewhere" ..
Further Information
Related articles
Overview
Content Tools
Tasks
