I am a rank amateur when it comes to SIP configs. I can wireshark the connection though. That is what I would recommend. Follow the call setup and see what is going wrong.
From: Lewis Bergman Sent: Friday, April 03, 2015 7:30 AM To: [email protected] Subject: Re: [AFMUG] SIP Trunks w/ Cisco UC-500 Strange. Are their phone configured for skinny instead of sip? That dead air and busy usually indicates an incorrect response if I remember correctly. Where is that phone guru Chuck? On Apr 3, 2015 8:08 AM, "Keefe John" <[email protected]> wrote: We have a customer trying to configuring their UC-500 Phone system with our SIP Trunks. They can't seem to figure it out and we're not UC-500 experts. Their system registers to our server but incoming calls get dead air for 60 seconds, then ring once, then an all circuits are busy error. At first they thought it might be NAT related so they setup 1:1 NAT with wide open firewall rules and it does the same thing. Any advice would be greatly appreciated! Thanks, Keefe
