Process and circuit arrangement for the transmission of message signals, in particular pcm message signals, from a transmission station to a receiving station

Claim 2

A process for the transmission of PCM time division multiplex signals utilizing available time slots in a pulse frame from a transmission station to a receiving station, said signals comprising address signals designating connections and message signals directed to said connections, including assigning each of the time slots of a first time range pulse frame to one of said connections designated by an address signal, said time slots in said first range carrying message signals to said connections, and transmitting the address signals of the connections in an increasing order of rank in successive time slot elements and succeeding one another with a second time range separate from said first time frame of said pulse frame, each of said time slots in said second time frame containing an address signal consisting of one individual bit.

Claim 3

A process as claimed in claim 1 wherein in the transmission of each pulse frame one of said address signals is transmitted in said second frame for each of said time slots carrying message signals in said first frame.

Claim 4

A process as claimed in claim 1 wherein in successive pulse frames said second time range includes address signals identifying different ones of said message carrying time slots of said first time range.

Claim 5

A process as claimed in claim 3 further including the steps of dividing the address signals to be transmitted in said second time range designating the connections between sending and receiving stations into groups, and transmitting said groups in cyclic succession in consecutive pulse frames, the address signal of each of said message carrying time slots of said first range being repeated after the transmission of a number of frames equal to the number of groups.

Claim 6

Telephone exchange apparatus for the transmission of PCM time division multiplex signals in time slots in a pulse frame from a transmission station to a receiving station in a PCM transmission system said signals comprising address signals in the time slots in a first range of said pulse frame designating connections, said address signals each consisting of one bit and following each other in increasing order of rank, and message signals in the time slots in a second range permanently assigned to the connections, said transmission station including a message signal register having a storage capacity corresponding to a number of time channels available for transmission between said transmission station and said receiving station, an address signal register for storing one of said one bit address signals for each of said message supervision means for storing said Incoming message signals in each of said pulse frames in said message signal register and for storing the address signal corresponding to each of said message signals in increasing order of rank in a sequence corresponding to the sequence of appearance of said message signals in said address signal register, and transfer means including a transmission line connected between said transmission station and said receiving station for forwarding the message signals and at least a portion of the address signals stored at said transmission station to said receiving station in a next succeeding pulse frame, said receiving station including an address signal and message signal register means for receiving and forwarding said message signals in accordance with said address signals during a next following pulse frame.

Claim 7

Telephone exchange apparatus for the transmission of PCM time division multiplex signals in time slots in a pulse frame from a transmission station to a receiving station in a PCM transmission system said signals comprising address signals in the time slots in a first range of said pulse frame designating connections, said address signals each consisting of one bit and following each other in increasing order of rank, and message signals in the time slots in a second range permanently assigned to the connections, said transmission station including a message signal register having a storage capacity corresponding to a number of time channels available for transmission between said transmission station and said receiving station, an address signal register for storing one of said one bit address signals for each of said message supervision means for storing said Incoming message signals in each of said pulse frames in said message signal register and for storing the address signal corresponding to each of said message signals in increasing order of rank in a sequence corresponding to the sequence of appearance of said message signals in said address signal register, and transfer means including a transmission line connected between said transmission station and said receiving station for forwarding the message signals and at least a portion of the address signals stored at said transmission station to said receiving station in a next succeeding pulse frame, said receiving station including an address signal and message signal register means for receiving and forwarding said message signals in accordance with said address signals during a next following pulse frame.

Claim 8

Telephone exchange apparatus as claimed in claim 5 including in said transmitting station and in said receiving station a second message signal register for storing message signals, and a second address register for storing addresses of messages in said second message register, and means for storing the pulse frames including said message and address signals alternately in said first and second message and address registers, and for forwarding said stored message and address signals in the next succeeding pulse frame.

Claim 9

Telephone exchange apparatus as claimed in claim 5 including supervision means coupled between an incoming PCM transmission line and said transmission station and including a signal evaluation means receiving said message signals for testing each signal for a predetermined minimum amplitude, a two input coincidence circuit having one input connected to said evaluation circuit to provide signals to said message signal register, and a delay line having a delay time corresponding to the processing time of said signal evaluation circuit, said delay line coupling each of the received message signals to the other input of said coincidence circuit.

Claim 10

Telephone exchange apparatus as claimed in claim 14 wherein the output of said evaluation circuit is coupled to a trigger input of said address register, whereby an address storage place is marked for each of said received message signals.