asterisk users - Aug 2009 - Xfer extension to extension call, flash hookpass through by Asterisk needed via quintum and X-lite/Eyebeam

Say,

I need to replicate what happens on a wired extension when a call is transfered
and transfered back.
Asterisk has to detect and pass through the flash hook to the Quintum when its
pressed on the Eyebeam.

My setup is:PBX-->Quintum FXS port --> Asterisk 1.4
Server<-->Eyebeam 1.5 softphone

The Quintum has to recognise the flash hook and pass this on to the PBX.
What setup is needed on Asterisk and any ideas on Quintum?

Thanks

Shaun
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