Hello,
We have Two PBX - A primary which handles all traffic and is linked to a registration based sip trunk to an external provider. The second PBX is purely there to give a route out to a second trunk.
We have just had new firewalls installed but when we pull the plug on the primary internet line the PBX does not seem to detect this and follow the trunk sequence to the backup. It sits for around 15-20seconds attempting the primary but then times out with Cause 18. It doesn’t try the backup route which is next in the trunk
Would this be because the trunk is registration based and we would need to wait for the 3600 sec timer to expire before it moved on?
Why would it not attempt next in sequence with a cause 18?
The firewall installer has tried everything they can think of, hours of testing but we can’t get the system to attempt the second route
Any advice greatly appreciated
5 posts - 3 participants