have you seen:
http://www.ozemail.com.au/~katalina
The software is called VoiceGuide, and allws you to graphically build your
own interactive voice response systems - dem script supplied to
get you going in 5 minutes.
supports voicemail, caller ID, distinct ringing, PABX transfers, fax-back
etc etc. see WWW or e-mail me for more info.
Cheers,
Kath