[asterisk-users] Phantom calls: Detecting hangup quicker

[Stephen Bosch]

Gavin Henry wrote:
> Dear all,
> 
> We seem to be getting phantom calls when a inbound caller via the
> legacy pbx hangups before
> the SIP handsets have answered. The extensions also seem to hear
> ringing on the lines too sometimes.
> 
>                                       SIP Inbound  >----
>                                                               |
> legacy pbx (analogue) <-> (sangoma a400d) asterisk <-> SIP phones
> 
> Basically if a user hangups before the call has bridged, I think.
> 
> Is there anything we can do about this?

Yet another "call progress detection" issue.

Analog lines are problematic this way. Search the archives for "call
progress detection" or "disconnect supervision".

-Stephen-