You guys were so helpful yesterday that I am back for more!

I have a basic Asterisk installation, 10 x 9133i with a Sangoma A200D with 1
(Dual) FXO module and HW Echo Cancellation.

If I call the BT line (let's say on my mobile) wait for the phones to ring,
then hangup my mobile the phones continue to ring for at least 30 seconds,
then voicemail kicks in and only when voicemail detects silence does the
line get hung up.

I believe it is a zapata.conf setting but not sure.

Any ideas?