Solved SIP Trunk Stopped Working After Upgrade to 15.5 SP6

[Wendelspanswick]

We had a working internal SIP trunk connection between a 3CX V15 and a Mitel 3300, we upgraded to V15.5 SP6 and the SIP trunk has stopped working.
External calls route through the Mitel to the 3CX (Ext 8161) but there is a pause of about 40 seconds then a 3CX recorded message says "Called number does not exist".
We have tried pointing calls at various 3CX extensions and queues with the same result.
It's annoying as it was working perfectly before the upgrade.

09/10/2018 11:25:49 AM - Leg L:1.1[Line:10000<<anonymous] is terminated: Cause: BYE from local
09/10/2018 11:25:20 AM - [CM503008]: Call(C:1): Call is terminated
09/10/2018 11:25:20 AM - Leg L:1.2[Extn:8161] is terminated: Cause: BYE from 3CXExtID:50:5060
09/10/2018 11:25:17 AM - [CM503007]: Call(C:1): Extn:8161 has joined, contact <sip:8161@3CXExtID:50:5060>
09/10/2018 11:25:17 AM - [CM503007]: Call(C:1): Line:10000<<anonymous has joined, contact <sip:10000@MitelIP:5060>
09/10/2018 11:25:17 AM - L:1.2[Extn:8161] has joined to L:1.1[Line:10000<<anonymous]
09/10/2018 11:25:07 AM - [CM503002]: Call(C:1): Alerting Extn:8161 by contact <sip:8161@3CXExtID:50:5060>
09/10/2018 11:25:07 AM - [CM503025]: Call(C:1): Calling T:Extn:8161@[Dev:sip:8161@3CXExtID:5060] for L:1.1[Line:10000<<anonymous]
09/10/2018 11:25:07 AM - [CM503027]: Call(C:1): From: Line:10000<<anonymous ("anonymous:8161" <sip:anonymous@3CXFQDN:5060>)  to  T:Extn:8161@[Dev:sip:8161@3CXExtIP:5060]
09/10/2018 11:25:07 AM - [CM503004]: Call(C:1): Route 1: from L:1.1[Line:10000<<anonymous] to T:Extn:8161@[Dev:sip:8161@3CXExtIP:5060]
09/10/2018 11:25:07 AM - [Flow] Call(C:1): has built target endpoint: Extn:8161 for call from L:1.1[Line:10000<<anonymous]
09/10/2018 11:25:07 AM - [CM503010]: Call(C:1): Making route(s) from Line:10000<<anonymous to <sip:8161@3CXIP:5060>
09/10/2018 11:25:07 AM - [CM500002]: Call(C:1): Info on incoming INVITE from Line:10000<<anonymous:
Invite-IN Recv Req INVITE from MitelIP:5060 tid=3273305744-106969375 Call-ID=3273305744-106969374:
INVITE sip:8161@3CXIP:5060;transport=udp SIP/2.0
Via: SIP/2.0/UDP MitelIP:5060;branch=z9hG4bK3273305744-106969375
Max-Forwards: 26
Contact: "DASSII" <sip:anonymous@MitelIP:5060;transport=udp>
To: <sip:8161@3CXIPAddress>
From: "DASSII" <sip:[email protected]>;tag=0_3273305744-106969376
Call-ID: 3273305744-106969374
CSeq: 1 INVITE
Session-Expires: 90;Refresher=uas
Min-SE: 90
Allow: INVITE, BYE, CANCEL, ACK, INFO, PRACK, OPTIONS, SUBSCRIBE, NOTIFY, REFER, REGISTER, UPDATE
Content-Type: application/sdp
Supported: replaces, timer
User-Agent: Mitel-3300-ICP 14.0.3.37
Privacy: id
Content-Length: 156
v=0
o=- 5677 5677 IN IP4 MitelIP
s=-
c=IN IP4 MitelIP
t=0 0
m=audio 50006 RTP/AVP 8 0 101
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-15
09/10/2018 11:25:07 AM - [CM503001]: Call(C:1): Incoming call from Line:10000<<anonymous to <sip:8161@3CXIP:5060>

IP address have been changed:
3CXIP = Local IP of 3CX
3CXFQDN = FQDN of 3CX
3CXExtIP = Local IP of ext
MitelIP = Local IP of Mitel

 

[Wendelspanswick]

Anyone or do I have to raise a ticket with 3CX?

 

[Peter Richardson]

1) Have you tried deleting the SIP Trunk and re adding it again?

2) Have you checked the logs?

3) Are there any authentication errors with your SIP Trunk?

4) Are you using a host name or an ip address to connect to your SIP Trunk?

5) Who is your SIP Trunk provider?

6) please avoid pasting big lots of code into the forum. Instead please use the "insert" button and select "code". You can edit your original post to fix this so that it's easier for others to view, copy, paste, troubleshoot, etc.

 

[Wendelspanswick]

1) Have you tried deleting the SIP Trunk and re adding it again?

2) Have you checked the logs?

3) Are there any authentication errors with your SIP Trunk?

4) Are you using a host name or an ip address to connect to your SIP Trunk?

5) Who is your SIP Trunk provider?

6) please avoid pasting big lots of code into the forum. Instead please use the "insert" button and select "code". You can edit your original post to fix this so that it's easier for others to view, copy, paste, troubleshoot, etc.

Hi Peter

Thanks for replying, to answer your questions:

1) I've deleted and re-added the SIP trunk on both the 3CX and Mitel

2) The messaging posted above is from the Activity Log for a failed call, I will try a Wireshark capture next.

3) Not sure on authentication errors, it uses IP addresses to authenticate rather than passwords.

4) As both systems are on the local network we are using IP addresses.

5) There is no SIP trunk provider as its direct SIP between two phone systems on the same local network, I used the UK Gamma template and left the default settings which worked on V15 but now fail on V15.5 SP6.

6) Will bear that in mind for next time.

 

[Wendelspanswick]

Deleted as no longer relevant.

 

[Wendelspanswick]

After lots of playing about I finally got it working again, originally I used the UK Gamma template which worked with V15 but not V15.5 SP6, this time I used a worldwide Generic template and its working again.
Comparing the 2 Wireshark captures it seems to be a difference in messaging during the ringing phase, with the new template I now get an ACK message which I wasnt getting before on the failed calls.

 

[YiannisH_3CX]

Glad to see the issue has been resolved and thank you for updating the thread with your solution.