Hi, i’ve been trying to setup a small FreePBX system and have mostly got it going after many bumps in the road.
My issue is that, apparently randomly, incoming calls hit the PBX, i get the INVITE listed in sngrp but the extensions(?) don’t connect or respond…
I have two Yealink phones.
A lot of the time the calls are fine and they go thru ok.
I’ve messed around with firewalls / port forwarding /NAT etc and nothing seems to make a difference.
Always seems to be random.
How can i dig down further into this problem?
Any help would be appreciated, feel like i’m going mad!
Here’s one of the INVITE requests:- 192.168.20.10 is the PBX server internal to my network.
`2025/02/13 15:02:20.573469 xx.xxx.xx.116:5060 → 192.168.20.10:5060
INVITE sip:s@137.xxx.xx.xx:5060;line=zckdunx SIP/2.0
Via: SIP/2.0/UDP xx.xxx.xx.116;branch=z9hG4bK2025021315021600009-1;rport
CSeq: 1 INVITE
Max-Forwards: 67
User-Agent: FireBrick/2.01.111
Call-ID: 2025021315021600009@2900-0601-0284-92
From: “Anonymous” sip:Anonymous@xxxxxx.xx.net.xx;tag=2025021315021600009
To: sip:s@137.xxx.xx.xx:5060;line=zckdunx
Contact: sip:2025021315021600009@xx.xxx.xx.116
Content-Type: application/sdp
Content-Length: 188
v=0
o=- 27530 0 IN IP4 xx.xxx.xx.116
s=call
c=IN IP4 xx.xxx.xx.116
t=0 0
m=audio 27530 RTP/AVP 8 101
a=rtpmap:8 pcma/8000
a=rtpmap:101 telephone-event/8000
a=ptime:20
a=sendrecv
`