Not accepting incoming calls


I have a very strange problem.
I can dial out through a sip trunk and recieve incoming calls through the same sip trunk.
But if I haven’t dial out for about 1-2 minutes I can’t recieve any incoming calls anymore until I dial out again.

Does anyone know what the problem could be or where I need to look for this problem?

Thanks for your help.


Sounds like a networking problem where the arp cache or something is getting cleared through normal usage. An incoming call, sets up the cache which after a preset time like 300 sec then clears itself. I would check your default gateway settings, DNS settings, etc…

Sounds like a registration issue with you provider.