Time division switching system

Claim 2

A communication switching system comprising: a plurality of input time division multiplex lines, a plurality of output time division multiplex lines, a switching network comprising a plurality of input terminals, a plurality of output terminals and network control means responsive to control signals for selectively interconnecting said input terminals and said output terminals; a plurality of input buffer memories, said plurality comprising at least one buffer memory for each of said input terminals and individually associated therewith; input transfer means for establishing trans-mission paths for transferring and distributing data words received from said input time division multiplex lines to said buffer memories in accordance with a fixed first distribution plan, the data words of a series of words from each multiplex line being distributed to and stored in the buffer memories of all of said input terminals in a pre-scribed sequence; means for selectively transmitting data words stored in said input buffer memories to said associated input terminals, means for generating said network control signals; and output transfer means for transferring data words from selected ones of said output terminals to selected ones of said output multiplex lines.

Claim 3

A communication switching system in accordance with claim 1 wherein said plurality of input time division multiplex lines are numbered 1 tHrough m said plurality of input terminals are numbered 1 through n and wherein said plurality of buffer memories comprises m times n buffer memories.

Claim 4

A communication switching system in accordance with claim 1 wherein said second transfer means comprises: a plurality of output buffer memories, said plurality comprising at least one output buffer memory for each of said output terminals and individually associated therewith, and network output means for establishing transmission paths for transferring data words received from selected ones of said network output terminals to said associated ones of said output buffer memories, and means for establishing transmission paths for transferring and distributing data words stored in said output buffer memories to said output multiplex lines in accordance with a fixed second distribution plan, said second distribution plan being complementary to said first distribution plan.

Claim 5

A communication switching system in accordance with claim 1 wherein the system further comprises clock means for generating a chain of clock pulses representing time slots, and wherein said first transfer means responds to each successive time slot clock pulse generated by said clock means to establish a plurality of paths equal in number to the number of said input time division multiplex lines to simultaneously transfer one data word if present from each of said plurality of input lines.

Claim 6

A communication switching system comprising: a plurality of input time division multiplex lines, a plurality of output time division multiplex lines, a switching network comprising a plurality of input terminals, a plurality of output terminals and a network control which responds to control signals to selectively interconnect the input terminals and the output terminals; a plurality of buffer memories comprising at least one buffer memory for each of the input terminals and individually associated with the input terminals; an input circuit arrangement for selectively transmitting data words stored in the buffer memories to the associated input terminals, a control circuit arrangement for generating the network control signals; CHARACTERIZED IN THAT: the switching system further comprises an input transfer circuit arrangement for establishing transmission paths for transferring and distributing data words received from the input time division multiplex lines to the buffer memories in accordance with a fixed first distribution plan, the data words of a series of words from each multiplex line being distributed to and stored in the buffer memories of all of the input terminals in a prescribed sequence; and a second transfer circuit arrangement for transferring data words from selected ones of the output terminals to selected ones of the output multiplex lines.

Claim 7

A communication switching system comprising: a plurality of input time division multiplex lines, a plurality of output time division multiplex lines, a switching network comprising a plurality of input terminals, a plurality of output terminals and a network control which responds to control signals to selectively interconnect the input terminals and the output terminals; a plurality of buffer memories comprising at least one buffer memory for each of the input terminals and individually associated with the input terminals; an input circuit arrangement for selectively transmitting data words stored in the buffer memories to the associated input terminals, a control circuit arrangement for generating the network control signals; CHARACTERIZED IN THAT: the switching system further comprises an input transfer circuit arrangement for establishing transmission paths for transferring and distributing data words received from the input time division multiplex lines to the buffer memories in accordance with a fixed first distribution plan, the data words of a series of words from each multiplex line being distributed to and stored in the buffer memories of all of the input terminals in a prescribed sequence; and a second transfer circuit arrangement for transferring data words from selected ones of the output terminals to selected ones of the output multiplex lines.

Claim 8

A communication switching system comprising: a plurality of input time division multiplex lines, a plurality of output time division multiplex lines, a switching network comprising a plurality of input terminals, a plurality of output terminals and network control means responsive to control signals for selectively interconnecting said input terminals and said output terminals; a plurality of input buffer memories, said plurality comprising at least one buffer memory for each of said input terminals and individually associated with said input terminals; input transfer means for establishing transmission paths for transferring and distributing data words received from said input time division multiplex lines to said buffer memories in accordance with a fixed first distribution plan, the data words of a seires of words from each multiplex line being distributed to and stored in the buffer memories of all of said input terminals in a prescribed sequence; means for selectively transmitting data words stored in said input buffer memories to said associated input terminals, a plurality of output buffer memories, said pluralitY comprising at least one output buffer memory for each of said output terminals and individually associated with said output terminals, and network output means for establishing transmission paths for transferring data words received from selected ones of said network output terminals to the said associated ones of said output buffer memories; and output transfer means for establishing transmission paths for transferring and distributing data words stored in said output buffer memories to said output multiplex lines in accordance with a fixed second distribution plan, said second distribution plan being complementary to said first distribution plan; and means for generating said network control signals.

Claim 9

A communication switching system comprising: a plurality of input time division multiplex lines, a plurality of output time division multiplex lines, a switching network comprising a plurality of input terminals, a plurality of output terminals and network control means responsive to control signals for selectively interconnecting said input terminals and said output terminals; a plurality of input buffer memories, said plurality comprising at least one buffer memory for each of said input terminals and individually associated with said input terminals; input transfer means for establishing transmission paths for transferring and distributing data words received from said input time division multiplex lines to said buffer memories in accordance with a fixed first distribution plan, the data words of a seires of words from each multiplex line being distributed to and stored in the buffer memories of all of said input terminals in a prescribed sequence; means for selectively transmitting data words stored in said input buffer memories to said associated input terminals, a plurality of output buffer memories, said pluralitY comprising at least one output buffer memory for each of said output terminals and individually associated with said output terminals, and network output means for establishing transmission paths for transferring data words received from selected ones of said network output terminals to the said associated ones of said output buffer memories; and output transfer means for establishing transmission paths for transferring and distributing data words stored in said output buffer memories to said output multiplex lines in accordance with a fixed second distribution plan, said second distribution plan being complementary to said first distribution plan; and means for generating said network control signals.