Child pages
  • Call Forwarding

Contents




Options

The following call forwarding options can be configured:



Configuration

You can configure Call Forwarding in the following ways:

Phone Menu

Settings → Call Features → Call Forwarding




Web User Interface

Identity → Features → Call Forwarding




Auto Provisioning

Here are the settings you can provision by Auto Provisioning for call forwarding:



SIP Trace

Call Forwarding Event "Always" has been activated on extB (2907) to extC (2908).

ExtA (2906) calls ExtB (2907)

Sent to UDP:
INVITE sip:2907@ser;user=phone SIP/2.0
Via: ...
From: <sip:2906@ser>;tag=8jbmt6uyae
To: <sip:2907@ser;user=phone>
Call-ID: 3c267129d25a-nxgouyz0hbhm
CSeq: 1 INVITE
Max-Forwards: 70
Contact: <sip:2906@192.168.9.3:1000;line=fnrzr7bp>;reg-id=1
...
User-Agent: snom370/7.3.10a
...
Content-Type: application/sdp
Content-Length: 450

...


Received from UDP:
SIP/2.0 100 trying -- your call is important to us
Via: ...
From: <sip:2906@ser>;tag=8jbmt6uyae
To: <sip:2907@ser;user=phone>
Call-ID: 3c267129d25a-nxgouyz0hbhm
CSeq: 1 INVITE
Server: OpenSer
Content-Length: 0

Call Forwarding on ExtB (2907)

Due to activated "Call Forwarding" ExtB (2907) sends the following message

Received from UDP:
SIP/2.0 302 Moved Temporarily Via: ... ... 
From: <sip:2906@ser>... 
To: <sip:2907@ser;user=phone>... 
Call-ID: 3c267129d25a-nxgouyz0hbhm 
CSeq: 1 INVITE 
Contact: <sip:2908@ser;user=phone> 
Diversion: <sip:2907@192.168.5.193:2051;line=uw7mmqzi>;reason="unconditional"
Content-Length: 0


where

  • Contact- Header contains the call forwarding target number ExtC (2908) and
  • Diversion- Header contains the Request-URI of the request prior to the diversion (ExtB = 2907) and the reason that the diversion occurred ("unconditional")

This is being acknowledged by extA (2906).

ExtA (2906) calls ExtC (2908)

From the Contact-Header (ExtC = 2908) ExtA retrieves the Request-URI to establish the call to. The Diversion- Header is included in the message:


Sent to UDP:
INVITE sip:2908@ser SIP/2.0
Via: ...
From: <sip:2906@ser>...
To: sip:2908@ser...
Call-ID: 3c26712e0ca0-277bggq3yblp
CSeq: 1 INVITE
Max-Forwards: 70
Contact: <sip:2906@192.168.9.3:1000;line=fnrzr7bp>;reg-id=1
...
Diversion: <sip:2907@192.168.5.193:2051;line=uw7mmqzi>;reason="unconditional"
User-Agent: snom370/7.3.10a
...
Content-Type: application/sdp
Content-Length: 450

...


Received from UDP:
SIP/2.0 100 trying -- your call is important to us
Via: ...
From: <sip:2906@ser>;tag=1vzevun4ns
To: sip:2908@ser;user=phone
Call-ID: 3c26712e0ca0-277bggq3yblp
CSeq: 1 INVITE
Server: OpenSer (1.1.0-notls (i386/linux))
Content-Length: 0


Received from UDP:
SIP/2.0 180 Ringing
Via: ...
...
From: <sip:2906@ser>;tag=1vzevun4ns
To: sip:2908@ser;user=phone;tag=n9p9qydq2n
Call-ID: 3c26712e0ca0-277bggq3yblp
CSeq: 1 INVITE
Contact: <sip:2908@192.168.8.230:1025;line=dy1frf90>;reg-id=1
...