Dave,

I think the issue is that in most countries, a call cannot stay in early-media stage for an unlimited duration.
I just tested that, and I receive a CANCEL from PSTN after 30 seconds.
Of course, it can be different in your country or depending on your carrier, so you should check the maximum pre_answered call duration you can hope where you are.

David Ponzone  Direction Technique
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Service Client IPeva
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Le 28 mars 2017 à 07:05, Dave Horton <daveh@beachdognet.com> a écrit :

I’d like to use something like mod_fifo, if possible to support my use case:

- caller calls in
- freeswitch sends 183 (pre_answer) but does _not_ answer the call
- via out of bands means, I send information to an “agent” that a caller is waiting (providing uuid, or parking slot)
- agent calls in (to the “parking slot” or equivalent)
- caller is now bridged with agent
- OR, if no agent calls in within X seconds, caller is rejected with a SIP 480

Is something like that possible with mod_fifo, or other module?

Dave
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