31 Jul
2024
31 Jul
'24
12:35 p.m.
I have integrated Microsoft teams and freepbx using Kamailio version 5.8 as
my SBC.
Calls from freepbx to teams are working fine with audio and I am having
challenges with calls from teams to freepbx. The calls rings and after
answering there is only way audio and the call drops off after thirty
seconds. My pbx is behind a microtik router and I have port forwarded my sip
port and rtp ports to freepbx and have also disabled sip alg. My Kamailio is
hosted in AWS. Below are google drive links logs for the incoming call in
Kamailio , freepbx and my Kamailio.cfg. I am thinking It's a
misconfiguration challenge or something else. Please help I am failing to
see my challenge.
kamailio.pcap -
https://drive.google.com/file/d/1aoJhksgwcH-52unwxuyzn8GAmG9PEnOM/view?usp=s
haring
freepbx.pcap -
https://drive.google.com/file/d/1JJXs9UOUFak5Y4uWI_ARB56vQfVYfSDj/view?usp=s
haring
kamailio.cfg -
https://drive.google.com/file/d/1v2ZtylOf8fIMYH4OckGmnP489PO7WI7J/view?usp=s
haring
Best Regards
8 Aug
8 Aug
7:40 a.m.
I think you have set up everything correctly but the issue with audio and dropped calls
could be due to a few factors
You should Double check your NAT and firewall settings. Ensure RTP ports are properly
forwarded and there is no interference from the MikroTik router.
Also Confirm SIP ALG is completely disabled on your router, as it sometimes re-enables
itself after a reboot.
Review your Kamailio configuration to ensure it handles NAT and RTP correctly. You might
need to tweak settings related to NAT traversal.
Please verify that both Kamailio & FreePBX have matching codecs and RTP port ranges
configured.
10:49 a.m.
Thank you very much iamolivasmith. On the freepbx and microtik I have double
checked and everything seems to be fine. Let me review my Kamailio config.
-----Original Message-----
From: iamolivasmith--- via sr-users [mailto:sr-users@lists.kamailio.org]
Sent: Thursday, 8 August 2024 1:41 PM
To: sr-users(a)lists.kamailio.org
Cc: iamolivasmith(a)gmail.com
Subject: [SR-Users] Re: Incoming call with one one way audio and cutting off
after thirty seconds
I think you have set up everything correctly but the issue with audio and
dropped calls could be due to a few factors
You should Double check your NAT and firewall settings. Ensure RTP ports are
properly forwarded and there is no interference from the MikroTik router.
Also Confirm SIP ALG is completely disabled on your router, as it sometimes
re-enables itself after a reboot.
Review your Kamailio configuration to ensure it handles NAT and RTP
correctly. You might need to tweak settings related to NAT traversal.
Please verify that both Kamailio & FreePBX have matching codecs and RTP
port ranges configured.
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