Incoming calls hang up on answer, Can't place outbound

@conexatech wrote:

Freepbx: 13.0.188.9
Asterisk: 13.11.2
OS: CentOS 6
Host: Google Cloud

Having an issue with calls,

When a call comes in the extension rings and then once answered immediately hangs up and when trying to place an outbound it wont go through.

I can see in the logs that it's sending a "BYE" and I see a warning:

[2016-10-17 16:41:01] WARNING[7875][C-00000001] chan_sip.c: Insufficient information in SDP (c=)...

Confused as though might be an issue with trunk connection but the calls are coming in, here is the pastebin link for the asterisk log with SIP Debugging on:

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