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OpenSER module diversion

diversion module implements the Diversion extensions as per draft-levy-sip-diversion-08. The diversion extensions are useful in various scenarios involving call forwarding. Typically one needs to communicate the original recipient of the call to the PSTN gateway and this is what the diversion extensions can be used for, and this can be controlled from OpenSER as well.

Diversion example


The following example shows a Diversion header field added to INVITE message. The original INVITE received by the user agent of sip:bob@sip.org is: 

INVITE sip:bob@sip.org SIP/2.0
Via: SIP/2.0/UDP 1.2.3.4:5060
From: "mark" <sip:mark@sip.org>;tag=ldgheoihege
To: "Bob" <sip:bob@sip.org>
Call-ID: adgasdkgjhkjha@1.2.3.4
CSeq: 3 INVITE
Contact: <sip:mark@1.2.3.4>
Content-Length: 0

The INVITE message is diverted by the user agent of sip:bob@sip.org because the user was talking to someone else and the new destination is sip:alice@sip.org : 

INVITE sip:alice@sip.org SIP/2.0
Via: SIP/2.0/UDP 5.6.7.8:5060
Via: SIP/2.0/UDP 1.2.3.4:5060
From: "mark" <sip:mark@sip.org>;tag=ldgheoihege
To: "Bob" <sip:bob@sip.org>
Call-ID: adgasdkgjhkjha@1.2.3.4
CSeq: 3 INVITE
Diversion: <sip:bob@sip.org>;reason=user-busy
Contact: <sip:mark@1.2.3.4>
Content-Length: 0


Links to documentation of diversion module:
Created by: miconda,Last modification on Thu 15 of Feb, 2007 [10:41 UTC]


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