FAQ/How to configure our pbx, so that the feature Record Missed Calls is active but not counting missed calls

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The desired functionality is implemented the following way in firmware Version 7; note that the PBX has to send the "reason" field correctly according to RFC 3326 ("The Reason Header Field for the Session Initiation Protocol"):

Received ...:

CANCEL sip:...
CSeq: 8044 CANCEL
Reason: SIP;cause=200;text="Call completed elsewhere"

See also this FAQ article: When a call is picked up by a different extension my phone still displays a "Missed Call" message. How can this be changed?

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