voip - SIP Trunk messaging -


i need make application appears enterprise pbx sip trunk.

i've not been able find description of actual messaging involved in call made through sip trunk.

i did capture of call through pbx --> trunk --> pbx in house, , looked me identical "302 moved temporarily" call flow. however, told not correct either.

what i'm looking example of message flow, or @ least description of it.

thanks

there no headers indicate sip trunk in sip message per se. trunks identified when either register on behalf of few numbers pbx can serve.

the specs can found here - https://tools.ietf.org/html/rfc6140

but 1 of newest form of bulk registration. other there specs in sipconnect determine trunk - pbx interaction. not entirely pbx expecting from.

i not sure mean "302 " call flow.


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