Call not hangup after redirected to IVR

[RichE (Rich)]

Have the same problems with a sangoma A200 card, works fine but if we introduce an IVR doesnt detect the hangup.

IVR keeping line open

As anybody come across this, calls in to and outgoing the pbx work fine on analouge (sangoma a200) they hang up when the caller hangs up, on SIP the IVR stops when then caller hangs up but on the analouge card it keeps the line open for over 10minutes after the caller has hung up, altered the timeout settings etc but cant find a reason why. Latest Distro.