Just wondering if anyone can help me with an ongoing problem I don’t seem any nearer to solving.
We are experiencing a problem on our asterisk based phone system. Every Monday we come in and we are having a problem with inbound calls. After setting up our phone system to log to a syslog server it has become clear that the issue is with a Cause 81 error. This builds up and eventually the inbound calls stop working until we manually restart the phone system.
We have already had BT out numerous times to investigate a possible fault on the line with no success.
I’ve had a look online to see what a Cause No. 81 error is - invalid call reference value.
This cause indicates that the equipment sending this cause has received a message with a call reference which is not currently in use on the user-network interface.
Is this definitely down to a fault with BT? Can anyone suggest how I can approach this with BT as we haven’t had much luck as yet!
In order to test the fault I have disconnected the phone system from the lines with the issue. All being well the phone system should be back up and running on Monday.
Thanks in advance