> > Does anybody have some specs or pointers to Telephone Pulse Dialing > > protoc. Pulse timing, interdigit times and so on. > > > >> Mark is 33.3ms, space is 66.6 ms > >> You will find it fairly international. > >> > > Anyone have the min. interdigit time > > Peter Cousens After posting the original question, I looked for more info and is also interested in the min/max digit pulse and of course the interdigit times. It is very simple to get a pic to do pulse dialing and most of the newer exchanges can handle pulse dialing. I read that the modern PABX/ exchange can also handle a much higher pulse rate (bit rate ?) so that the waiting to get connected is about the same as tone dialing. Where is the specs ??? Kind regards Cassie