I have a scenario that works with one ITSP, and not with another.
With Broadvox Fusion network, call comes into office, is answered by receptionist and transferred successfully. Call is picked up on transfer and placed on hold, then picked up and transferred to another extension. Extension received internal call, but calling party from outside office is dropped. Same scenario on a call from VOIP.ms works without issue. I've forwarded a trace to Broadvox, and they are responding that we don't respond to their Okay with an Ack, so they send a Bye. I do see that, but see some other things going on. First, the bye seems to come very fact, but I don't know what the timing requirements are for sending the bye. Additionally, right after they send the second bye, I see a 100 trying and 200 OK being sent to them. Not sure what I am missing in this capture. Site is running on 4.4 with updates, Polycom 550 phones. I'm not suspecting the phones since it works with VOIP.ms. If anyone has ideas, I'd love to hear them.
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