Caiviar (Rough homophone of "CAPI IVR") is a system for controlling a callcenter using a
ISDN Capi cards. (It also contains a driver hack for getting more than one
card working on a system even if not supported by the hardware manufacturer).
Besides supporting all the standard applications for ISDN (answering machine, fax machine (both ways), call connecting, dial-out, explicit call transfer, etc.), it also has integrated support for a number of text-to-speech libraries, for easy set-up of complex telephony applications.
This system has been used so far in a telephone shop system by a company in Munich and for doing on-site automated traffic analysis by a company in Berlin.