UK FXO hangup detection with a twist

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UK FXO hangup detection with a twist
\ Steve Davies (31 Mar 2008)
. \ Conrad Wood (31 Mar 2008)
. \ Mike Dent (31 Mar 2008)
. . \ Steve Davies (31 Mar 2008)
. . . \ David Boyd (31 Mar 2008)
. . . . \ Steve Davies (31 Mar 2008)
. . . . . \ Gordon Henderson (31 Mar 2008)
. . . . . \ Mojo with Horan & Company, LLC (1 Apr 2008)

Subject:	UK FXO hangup detection with a twist
Group:	Asterisk-users
From:	Steve Davies
Date:	31 Mar 2008

Hi,

The twist? We actually have far-end hangup detection working fine, and
that seems to be where the problem lies for most people. Our problem
seems to be with requesting a hangup from our end reliably.

If we originate the call, we can hang it up. This suggests to me that
the Sangoma A200D is sending the correct hangup signaling. This way
round, it is 100% reliable.

If we accept a call originated elsewhere, then we cannot hang it up.
Only the call originator seems to be able to do that. The upshot is
that if asterisk hangs-up a line, and then tries to re-use it for an
outbound call before the remote has disconnected, we are simply
re-connected to the original caller, and start to play DTMF at them!

Has anyone experienced this before? Anyone found a solution?

Thanks,
Steve

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