[asterisk-users] QSIG transfer of calls away from Asterisk?

[Tony Mountifield]

I have a question concerning an Asterisk box connected to another
(non-Asterisk) PBX using QSIG signalling over an E1 connection.

Certain extension numbers of the external PBX are routed to the
Asterisk box, which in turn routes calls to its own extension phones.
Dialplan routing is also in place so that users of those phones can
also make calls routed over the E1 to extensions of the external PBX.

I think that if an incoming call (PBX->Asterisk) is then transferred
to an external extension, the call continues to pass through the
Asterisk box, consuming two B-channels on the E1.

Is it possible (a) in the QSIG protocol and (b) in the Asterisk
implementation of it, to arrange it so that a transfer such as
described above causes the call to revert back to being handled
completely by the external PBX, and release the two B-channels?

Cheers
Tony
-- 
Tony Mountifield
Work: tony at softins.co.uk - http://www.softins.co.uk
Play: tony at mountifield.org - http://tony.mountifield.org