>By using ISDN - you would receive notfication and send
>control in digital to/from the local 'switch' which is
>your interafce into the telco network. The ISDN I/F
>would notify you (as it does for all phases of a call)
>if the far end picked up on the call, as the call's
>*voice circuit* is not cut through (this saves the LD
>network provider money) until a call is actually picked
>up on the far end ... unless the far-end 'terminating'
>switch is something old that doesn't speak SS7 back
>into the network ...

        BTW, this is an interesting subject - Does anyone knows how to interface a=
 PIC to an ISDN line, and get/send data/control on it? I'd love to fiddle=
 with it :o)))


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Alexandre Souza
taito@terra.com.br
http://planeta.terra.com.br/lazer/pinball/

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