I am implementing a small setup for a customer with the UC520 and about 8 IP Phones. So far we have this problem where the customer wants to call forward all calls to their mobile when they are not in the office. This works fine with internal calls to their extension, but once an incoming call is forwarded, the line dosen't disconnect after the call ends.
I suspect it has something to do with the disconnect tone, but the issue only occurs in the above senario. I have already enabled "supervisory disconnect dualtone mid-call" on the FXO port with no success.
trunk-group ALL 58
supervisory disconnect dualtone mid-call
timeouts call-disconnect 3
timeouts wait-release 3
connection plar opx 511
This project is in Singapore.
Any help is greatly appreciated.
Thanks a lot in advance