3CX stopped to receive calls

[admined]

Hi,

my system on prem with 8 PRO license was working flawlessly.

A few days ago incoming calls stopped working.

I called my SIP trunk provider and he says it's all fine.

Analyzing the logs i discovered some strange behavior:

1) when the call drops, I saw it in the "portal section" and the timer is still going on
2) in the event log I see this:

EventID 50029
Call from <sip:[email protected];user=phone>;tag=1c2121681930 to <sip:[email protected];user=phone> has been dropped as it was not acknowledged in time. Please verify configuration and ensure there are no connectivity issues.

I don't know where the system get this IPs:

10.39.31.20
10.39.31.142

They're not in my subnets, they aren't in the firewall. I really don't know where the system finds them.

I verified the firewall (pfsense) configuration, nat rules, I restored a working backup of PBX but I always get the same error.

Firewall check is GREEN
Outbound calls are working

Thanks

 

[Allinone]

I have the same problem, too.
Did you manage to solve it?

 

[fxbastler]

I have the same problem, too.

Just to clarify:

1. You have also an PfSense as router in front of your 3CX 8 SC pro on-premise instance?
2. You have also unknown subnets in you 3CX eventlog about incoming calls?

In any other case (andy maybe this / yours) - please describe in more detail about the used environment (3CX) and the problem. Also: which SIP provider is being used?

 

[Allinone]

Complex scenario: Operator A's connectivity with a GNR 300 number works, while 15 numbers with Operator B have this problem.
Both Italian operators. The subnet is not present on any VLAN. Firewall Fortinet

 

[KyriacosS_3CX]

@Allinone, perhaps a new thread in the main forum areas, with a clear description of your issue will help everyone provide better input.