Unexpected SIP Service Crash 3CX Version: 20.0 Update 5 (Build 551)

[Simsyn_Support]

Hi Everyone,

We're experiencing an issue with one of our customers 3CX Phone System where the SIP service is crashing unexpectedly. We've already enabled verbose logging, but so far, we haven't been able to identify any clues pointing to the root cause.

Could anyone advise which other logs or tools we should look into to help diagnose this issue more effectively? Any guidance would be greatly appreciated.

Thanks in advance!





3CXSystemService.log
=================
2025/07/12 09:17:35.755|0030|Trac| CHR _sock.Available == 0
2025/07/12 09:17:35.764|0077|Trac| SIPSERVER disconnected
2025/07/12 09:17:35.770|0030|Trac| CHR Disconnected
2025/07/12 09:17:35.773|0030|Trac| rcv_OnDisconnection


3CXIVR.log
=========

12/07/2025 09:17:35.633 [0006861b] RTCP sent report to 127.0.0.1:7151
12/07/2025 09:17:35.756 [00068616] SL:Receive failed: socket closed
12/07/2025 09:17:35.757 [00068616] SL:Remote disconnect: "LBFINANCEV20-3CX:5482/CallManager" stopped
12/07/2025 09:17:35.757 [00068616] disconnect from pbx detected



3CXQueueManager.log
==================

2025/07/12 09:17:35.761|0005|Trac| [_3CX.QueueManager.OmCallsManager] SqcallDialogChanged(act=Delete, confObject=Wstatistics.267401: S_QCALLDIALOG.267401aTc6g0VaBsZKRTUJHfVHg..03c304758)
2025/07/12 09:17:35.763|0019|Trac| SIPSERVER disconnected
2025/07/12 09:17:44.441|0007|Info| [_3CX.QueueManager.PollProcessor] Statistics:


3CXCallFlow.log
=============
2025/07/12 09:17:30.756|0017|Trac| [_3CX.Script] _958_42.Main.597552.[C:221207.4]-LBDFS - CallID 239dbefc97010000_221207 - CallFlow.CFD.TransferComponent 'Transfer5' - Call Transfer succeeded, call disconnected
2025/07/12 09:17:30.756|0017|Trac| [_3CX.Script] _958_42.Main.597552.[C:221207.4]-LBDFS - CallID 239dbefc97010000_221207 - Callflow - Disconnect handler flow is empty...
2025/07/12 09:17:35.774|0010|Trac| SIPSERVER disconnected
2025/07/12 09:17:35.774|0002|Trac| [_3CX.ScriptRunner] Active script instances: 5
2025/07/12 09:17:35.885|0010|Info| Cancelled CallManger Request transaction task 3CXCallFlow01.RouteToAsync.30327




However, the last log record captured in 3CXPhoneSystem-20250712-091651.blrec around 12/07/2025 09:17:32:972

12/07/2025 09:17:32:972 | 12 | Lsip{6527785284/221213.1/UAS[GotInvite&Neutral]} incoming call:
InvIN Recv Req INVITE from 127.0.0.1:5080 tid=Pj7c0be4c0851e4bbc975dc48d177cf12a Call-ID=edd550f3799047878c4f5ba5eb139b7e:
INVITE sip:**********[email protected]:5060;transport=UDP;tag3cx=863e9cf1e9da4251a2ca6d826c358454 SIP/2.0
Via: SIP/2.0/UDP 127.0.0.1:5080;branch=z9hG4bK-524287-2---Pj7c0be4c0851e4bbc975dc48d177cf12a;rport=5080
Via: SIP/2.0/UDP 192.168.52.125:56760;branch=z9hG4bK-524287-1---tunneltid;rport;tnlid=clnt.1-060fb8e84ec44aa584fe91025bd8eccd
Via: SIP/2.0/TCP 192.168.52.125:50195;rport;branch=z9hG4bKPj7c0be4c0851e4bbc975dc48d177cf12a;alias
Max-Forwards: 69
Record-Route: <sip:[email protected]:5080;user=proxy;uri=clnt.1-060fb8e84ec44aa584fe91025bd8eccd>
Contact: "*************" <sip:[email protected]:5060;rinstance=1-060fb8e84ec44aa584fe91025bd8eccd>
To: <sip:**********@******-*****.my3cx.sg;tag3cx=863e9cf1e9da4251a2ca6d826c358454>
From: "***************"<sip:245@***********-*****.my3cx.sg>;tag=d70e327bf42a4b488ba4dd9213bebd3b
Call-ID: edd550f3799047878c4f5ba5eb139b7e
CSeq: 16596 INVITE
Session-Expires: 1800
Min-SE: 90
Allow: PRACK, INVITE, ACK, BYE, CANCEL, UPDATE, INFO, SUBSCRIBE, NOTIFY, REFER, MESSAGE, OPTIONS
Content-Type: application/sdp
Proxy-Authorization: Digest username="yW0ce3kshV",realm="3CXPhoneSystem",nonce="414d53596871dad446:2a36728b51172642b237e6717e9d4119",uri="sip:************@********-*****.my3cx.sg;transport=tcp;tag3cx=863e9cf1e9da4251a2ca6d826c358454",response="628702a8c357da6a4cd32eb11420b211",algorithm=MD5
Supported: replaces, 100rel, timer, norefersub
User-Agent: 3CXPhone for Windows 16.3.0.264
Content-Length: 463


v=0
o=- 3961300653 3961300653 IN IP4 192.168.52.125
s=pjmedia
b=AS:117
t=0 0
a=X-nat:0
m=audio 10034 RTP/AVP 120 9 0 8 18 96
c=IN IP4 192.168.52.125
b=TIAS:96000
b=AS:117
a=rtcp:10035
a=sendrecv
a=rtpmap:120 opus/48000/2
a=fmtp:120 useinbandfec=1
a=rtpmap:9 G722/8000
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:18 G729/8000
a=fmtp:18 annexb=no
a=rtpmap:96 telephone-event/8000
a=fmtp:96 0-15
m=video 0 RTP/AVP 31
c=IN IP4 127.0.0.1




Level = 8
Severity = Debug
Tread = 12
Source = /Sources/Projects/PbxServer/src/InviteADS.cpp, line:218

 

[TheodorosG_3CX]

Since you have created a support ticket we will proceed on the investigation from there.