[Asterisk-Users] Sipura, Asterisk, *0, and Call Waiting

[PBX Tech]

I have searched through all the lists and found that some people have had 
luck with flash hook, then *0 to answer a call waiting call.

I have an Asterisk server with one FXO card, the dialtone for the fxo card 
is providing by another pbx called a Definity.

When I am on the Sipura, and another call comes in, I hear the call-waiting 
indicator, when I flash hook I just hear tone, if I dial *0 I just hear dead 
air.

Its like the Asterisk isnt flashing the fxo line.

Any suggestions?

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