"Fooling around with alternating current is just a waste of time. Nobody will use it, ever."
|4021618||Intra link calling within a subscriber digital system|
Disclosed is a feature for use in a subscriber digital multiplexer interfacing between a central telecommunications office (CO) and a plurality of remote terminals, each remote terminal serving a number of subscribers. Calls from and to lines at the same ...
|4001514||Subscriber digital multiplexing system with time division concentration|
A digital multiplexer for transmitting control, signaling and speech information in digital form between a central telecommunications office (CO) and a plurality of remote terminals. The system serves a plurality of lines at the exchange and couples those...