Freepbx version 13.0.190.19 Asterisk version 13.7.1
We have struggled with this problem for a long time. Can never seem to nail it down. We are using SIP trunks. Several times a day an outgoing call will not go through or will only last 5 - 10 seconds then get dropped. We have a Sonicwall between us and the ISP. The Sonicwall is not ours. For several years there was a Asterisk based system that worked fine in the same environment. I believe the asterisk version was 1.8. Today the customer called the SIP trunk provider and had several calls fail. The provider sent this to me:
Didn’t mean to be so BOLD in the op. I now have the SIP packets from the Sonicwall being captured for me.
here is a packet from an outgoing call:
SIP/2.0 200 OK
From: “Unknown” sip:[email protected];tag=as21792aa0
To: sip:104.245.86.155;tag=sip+1+95c40034+acd5397a
Via: SIP/2.0/UDP 66.188.38.125:5060;received=66.188.38.125;rport=5060;branch=z9hG4bK7b1e0749
Server: SIP/2.0
Max-Forwards: 70
Contact: sip:[email protected]:5060
Call-ID: [email protected]:5060
CSeq: 102 OPTIONS
User-Agent: FPBX-13.0.190.19(13.7.1)
Date: Wed, 05 Apr 2017 13:33:21 GMT
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE
Supported: replaces
Content-Length: 0
I am not sure about the Unknown in the From and Contact fields. This packet is from the Sonicwall. The 66.188.38.125 is the WAN of the network for install.