1. Unique-ID is the session UUID, this won't change at all during the session (aka call). 2. Channel-Call-UUID is either the same as Unique-ID or the Unique-ID of the session you're bridged to by looking at the source code. 3. sip_call_id will be the sip call_id of an inbound/outbound SIP call, More than likely the outbound would match Unique-ID and on inbound it would be what ever the remote party sets/sends. The bigger question is what exactly are you trying to solve/understand? On Thu, Nov 6, 2014 at 7:52 AM, Israel Fink <ifink@machshevet.com> wrote:
I'm a bit confusing about the channel variables that represent the call ID.
I find that there are three variables, 1) Unique-ID 2) Channel-Call-UUID 3) variable_sip_call_id, what is the different between this.
The value of Channel-Call-UUID seems to be stable during the entire call, the value of Unique-ID in the begin it is the same as Channel-Call-UUID but when bridging it changes it value to another ID, then it comes back to the beginning value, i.m not clear when and why.
The variable variable_sip_call_id many time don't have any value, and also it changes the value when bridging and then comes back to the previous value.
I have looked for an explanation in FreeSWITCH wiki, but don't find.
In the mailing list a have found an explanation here: http://lists.freeswitch.org/pipermail/freeswitch-users/2013-August/099035.ht..., but still not enough. Can someone give a good explanation about this variables,what is their purpose, and so on.
Israel Fink - Developer Machshevet team
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