DTMF dialing signals insertion method e.g. into data stream containing data packets, involves inserting DTMF dialing signals into data packets of data stream in which coded useful information is contained

摘要

The method involves inserting DTMF dialing signals (DSD8) into data packets (A1, A2, A3,...) of a data stream in which coded useful information is contained. The possible DTMF signals are digitized and coded and stored as packets in place of the useful information contained within packets and inserted into the data stream in such a way that packets rejected provided and packets with useful information are modified. An independent claim is included for a device.