Arrangement for interfacing the space stage to the time stages of a T-S-T digital switching system
AssigneeGTE Automatic Electric Inc.
InventorsNathaniel Simmons, Sergio E. Puccini, Stig E. Magnusson, Kamal I. Parikh
Life of this patent
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Abstract
An arrangement for interfacing the originating time stage (OTS) and terminating time stage (TTS) of a time and control unit (TCU) to the space stage of T-S-T digital switching system. The space stage includes an intra-path through the space stage as well as an interpath. The interface transmits PCM samples simultaneously from the OTS to both the intra and interpaths of the space stage. PCM samples from the space stage are received by an intra buffer and an inter buffer from the intra path and inter path respectively. A TCU control memory gates and connects either the intra buffer or inter buffer to the TTS.
Claims6
An interface for a time-space-time network for sending and receiving communications information comprising PCM samples between a time and control unit and a space stage matrix having at least first and a second space state units, each space stage unit forming a separate and distinct path through said space stage matrix and said time and control unit including an originating time stage having an information memory originating for storing said communications information, said information memory originating connected to a source of control signals, and a terminating time state including an information memory terminating and a control memory terminating said control memory terminating connected to said source of control signals, said interface comprising:
- sending means including at least a first bus driver having an input connected to said information memory originating of said time and control unit and an output connected to said first space stage unit and at least a second bus driver having an input connected to said first bus driver input and said second bus driver output connected to said second space stage unit, said sending means arranged to simultaneously transmit said communications information from said originating time stages information memory originating to each of said first and second space stage units responsive to said control signals;
- first and second receiving means connecting said time and control unit to each of said first and second space stage units respectively, said first and second receiving means each arranged to receive communications from said first and second space stage units respectively;
- and
- selection means connected to each of said first and second receiving means and to said control memory terminating, and responsive to control signals from said control memory terminating said selection means connects said first or alternatively said second receiving means to said information memory terminating transmitting said communications information to said terminating time stage.
Dependencies are inferred from the claim text.