[Asterisk-Users] chan_capi-cm and dialing without number

[Klaus Darilion]

Hi!

Is it possible to bridge a call (incoming call leg is from the PBX, 
outgoing call leg is to the PSTN) without even dialing a number. Thus, 
the dial tone received from the PSTN should be forwarded to the PBX, and 
the overlap digits received from the PBX should be forwarded to the PSTN.

I tried the following, but it does not work. Is there a workaround?

[frompbx]
exten => s,1,Dial(CAPI/g1//b,90)

thanks
klaus