when i make a call from sip to pstn through gxw4108 or from pstn to sip, then i hang up from pstn, i can hear then hear a tone of a call that been hang up but the channel would be still in use until the sip client hang up.
i need to make the channel be free when either sip client or pstn end point hangs up.
when a sip client hangs up then channel is free. the issue is when a pstn end point hangs up!
which parameters i could go through in order to solve this ?