The routing of incoming SIP calls, including SIP line appearances, is covered in SIP Incoming Call Routing. However, the following key points should be observed:

• Call matching to an incoming call route destination (or an extension match to the Local URI value) is still required. The call is rejected if that does not occur.

  • This is necessary to associate the call with a user or group whose settings (for example forwarding and voicemail) it follows until answered.

  • If the incoming call route destination is a user with a matching line appearance button for the call, then the additional private line features for a line appearance call are applied. See Line Appearance Buttons.

• As normal, if the call is answered by the voicemail service, whilst it is indicated on line appearance buttons, they cannot be used to answer or bridge into the call.