首页>
外国专利>
Procedure for the exchange of command Signals, through the use of a System, in the connection traffic in Telephone Networks, particularly in Networks with equipment for Laboratories in sub automatic transmission
Procedure for the exchange of command Signals, through the use of a System, in the connection traffic in Telephone Networks, particularly in Networks with equipment for Laboratories in sub automatic transmission
Procedure for the exchange of signals in the control of link traffic in Telephone Networks, including Networks of devices with Automatic Transmission in sub region, through the use of pulse Signals, i
展开▼