Alcatel Unleashed

Trunk to trunk calls do not drop when parties hang up. The reason is the carrier is sending open loop for 500 ms. (OXO version 9.2)
I have determined that disconnect from the central office of 700ms or greater. (No current / Remove battery ) and the OXO analog trunk will drop properly when the outside caller hangs up. Less than 700 ms and the OXO does not see the disconnect signal. Is there a way to program the OXO to terminate the call with 500ms disconnect signal?

Thank you

Was there a solution to this ? I have an issue where my analogue lines are not always dropping when the caller hangs up.. are there default settings for analogur trunks in the UK ?