Digital signal transmission system
Digital signal transmission system
Digital signal transmission system
Digital signal transmission system having monitor equipment
Digital signal transmission system including means for convertin
Digital signal transmitting and/or receiving system
Digital signal transmitting method
Digital signal transmitting system
Digital signal transmitting system
Digital signalling receiver for receiving PCM tones
Digital span frame detection circuit
Digital span reframing circuit
Digital speech interpolation system and speech detector
Digital subscriber carrier system including drop terminals and b
Digital subscriber communication system
Digital subscriber controller
Digital subscriber line circuit for connecting an ISDN subscribe
Digital subscriber line termination with signalling
Digital switch module having encoding law conversion capability
Digital switching arrangements for stored program control teleco