I have an asterisk server installed with Verison 16.17.0 on CentOS Linux release 7.9.2009 (Core) on AWS Infrastructure.
In this server, I have two SIP trunks connected from 2 different telecom operators and I have noticed that my sip peers are going unreachable intermittently but the sip show registry showing that SIP is still registered on my server, I have also checked ping response and there are no drops.
Am using the chan_sip driver.
As checked the logs able to see that
[Sep 14 11:46:14] NOTICE chan_sip.c: Peer ‘OPR-sip-trunk’ is now Lagged. (2005ms / 2000ms)
[Sep 14 11:46:24] NOTICE chan_sip.c: Peer ‘OPR-sip-trunk’ is now Reachable. (12ms / 2000ms)
During this happens the existing calls whichever running on the server are remain connected and working and new outgoing calls getting dropped with reason
[Sep 14 11:46:24] WARNING[C-0000027d] app_dial.c: Unable to create channel of type ‘SIP’ (cause 20 - Subscriber absent)
I have also checked this SIP trunk from The operator end and there are no issues from the Telecom operator end.
Can anyone suggest on this/