Dropped calls


#1

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:

BYE sip:83e2e7e2d50c17c31afdc63efd34c9c1@104.245.86.155:5060 SIP/2.0

Via: SIP/2.0/UDP 66.188.38.12:5060;branch=z9hG4bK5ae80c83;rport

Max-Forwards: 70

From: sip:19896311030@66.188.38.12;tag=as722f21ee

To: sip:*6718778771250@104.245.86.155;tag=sip+1+a7e00011+92a173d4

Call-ID: 4a120d6b5bb1c4ac557f492a76bd8036@66.188.38.125:5060

CSeq: 103 BYE

User-Agent: FPBX-13.0.190.19(13.7.1)

X-Asterisk-HangupCause: No user responding

X-Asterisk-HangupCauseCode: 18

Content-Length: 0


I am going to start a tcpdump on the system to see if I can trap bad calls.


#2

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:Unknown@66.188.38.125;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:Unknown@66.188.38.125:5060
Call-ID: 1e36e4f972c829da059d1ad05dc21141@66.188.38.125:5060
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.


(Greg Snover) #3

Check out this guide I wrote here:

My guess is you are missing some of the settings - more than 75% of my base is behind Sonicwalls with no problems with dropped calls.


#4

Thanks Greg I will forward that link to the IT guys