OptionsThe following call forwarding options can be configured: - Off: Call forwarding is deactivated by default.
- Always: Incoming calls are immediately forwarded to the target number. See more details under the setting links: fwd_all_enabled, fwd_all_target, fwd_all_on_code, fwd_all_off_code
- Busy: Incoming calls are immediately forwarded when the phone is busy to the target number. Note: This feature will only work if Call Waiting is disabled. See more details under the setting links: fwd_busy_enabled, fwd_busy_target, fwd_busy_on_code, fwd_busy_off_code
- Time: Call forwarding to the target number is activated when the time (in seconds) entered has passed without the call having been answered. See more details under the setting links: fwd_time_enabled, fwd_time_target, fwd_time_secs, fwd_time_on_code, fwd_time_off_code
ConfigurationYou can configure Call Forwarding in the following ways: Settings → Call Features → Call Forwarding 
Web User InterfaceIdentity → Features → Call Forwarding 
Here are the settings you can provision by Auto Provisioning for call forwarding:
SIP TraceCall Forwarding Event "Always" has been activated on extB (2907) to extC (2908). ExtA (2906) calls ExtB (2907)| Code Block |
|---|
| title | Sent to UDP: |
|---|
| linenumbers | true |
|---|
| 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
... |
| Code Block |
|---|
| title | Received from UDP: |
|---|
| linenumbers | true |
|---|
| 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 | Code Block |
|---|
| title | Received from UDP: |
|---|
| linenumbers | true |
|---|
| 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:
| Code Block |
|---|
| title | Sent to UDP: |
|---|
| linenumbers | true |
|---|
| 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
... |
| Code Block |
|---|
| title | Received from UDP: |
|---|
| linenumbers | true |
|---|
| 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 |
| Code Block |
|---|
| title | Received from UDP: |
|---|
| linenumbers | true |
|---|
| 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
... |
| Include Page |
|---|
| Howto Footer - uni-en |
|---|
| Howto Footer - uni-en |
|---|
|
| Content by Label |
|---|
| showLabels | false |
|---|
| max | 20 |
|---|
| spaces | PW |
|---|
| showSpace | false |
|---|
| sort | title |
|---|
| type | page |
|---|
| cql | label = "deskphone" and label = "call-feature" and type = "page" |
|---|
| labels | dect dect-multicell |
|---|
|
| 
