[Asterisk-Users] flash button on asterisk + legacy pbx system

[Giorgio Incantalupo]

Hi,
I have to connect  an old PBX to a new Asterisk box. but I must keep the 
same flash button functionality of the old system. Is it possible to 
tell asterisk to send a Flash signal to old pbx when receiving it from a 
phone? I know there is a flash command inside asterisk....is there 
anybody who tried and deployed such a double-pbx system with success?

TIA

Giorgio Incantalupo