Hello, I do remember having read some weeks ago something about a virtual device provided by asterisk, behaving like an ISDN device, i.e. like /dev/isdn0. I know iaxmodem, but iaxmodem imho unfortunately does not transport raw ISDN data (HDLC frames), but only voice. Do I remember right, and there is an aseterisk application, providing such a device, which other linux executables can use, which expect a common ISDN device? Roger.