| 摘要 |
A method and apparatus are disclosed for transmitting a communication through a communications channel when the communication has been encoded with any number of signals. The invention comprises detecting a presence of one of the encoding signals and then generating another predetermined signal, and then combining the encoding signal with the predetermined signal to form a combined signal. The combined signal is then transmitted through a communications channel and received with a terminal, after which the combined signal is separated into the encoding and predetermined signals. The receipt of the encoding signal is verified by the presence of the predetermined signal. Also disclosed is an application of the method and apparatus to the transmission of Baudot tones through a telecommunications network. |
