I have a fixed GSM terminal line connected to the LINE port of my OBi110.
This lets me accept incoming calls to my previous landline # (now ported to
a T-mobile prepaid service); it also provides a 9-1-1 service.
I have CallForwardOnBusyEnable and CallForwardOnNoAnswerEnable
both enabled with the same forwarding # (3 rings for no answer).
The forwarding number goes to a Google Voice service; the CallerID
is used to ensure the call goes directly to voicemail. This is working fine,
except after the caller hangs up, the connection is not dropped, and
the voicemail records a "offhook warning beep".
My guess is that the fixed GSM terminal thinks it has signalled "end-of-call" to
the OBi110, but the OBi110 did not detect the end-of-call.
I suspect I need to modify some parameters in the "PSTN Disconnect Detection"
section; any recommendations on where to start?