Data exchange and coupling apparatus

Claim 2

Apparatus for use with a communication line used for multiplexed data transmission wherein data occurs as a plurality of periodically recurring interlaced data channels comprising, in combination: means for periodically sampling and storing data occurring during the time period of a data channel, comprising tow separate units for removing data at different predetermined time slots and further comprising multiplexing means for interlacing said data before transmission to said closed loop; means for supplying said stored data to a closed loop wherein the supplied data is presented to the closed loop in a multiplexed format comprising a plurality of interlaced data channels recurring on a lower frequency rather than the data channels of said communication line; and means for receiving data from said closed loop and for exchanging said received data in said predetermined time slot in place of the stored data, comprising two separate units for exchanging the data in the different predetermined time slots.

Claim 3

Apparatus for use with a multiplex communication link comprising, in combination: input and output means for providing input signals to and output signals from the apparatus; demodulating means; multiplexing means; modulating means; means connecting said demodulating means, said multiplexing means and said modulating means between said input means and said output means so that multiplexed signals will pass uninterrupted therebetween a majority of the time; data exchange means for periodically storing signals supplied by said demodulating means, preventing acceptance of said signals by said multiplexing means and substituting therefor new signals to be multiplexed into the portion of the communication link signals previously occupied by the stored signals; signal loop means including a plurality of serially connected load means for accepting the stored signals from said data exchange means in serial multiplexed format for transmission to said load means and for returning substitute signals to said data exchange means; and said data exchange means comprising first and second units each of which periodically stores signals occurring at different relative periodic times and also comprising further multiplex means for combining the output signals of said first and second units before transmission to said signal loop means.

Claim 4

Apparatus for use with a multiplex communication link comprising, in combination: input and output means for providing input signals to and output signals from the apparatus; demodulating means; multiplexing means; modulating means; means connecting said demodulating means, said multiplexing means and said modulating means between said input means and said output means so that multiplexed signals will pass uninterrupted therebetween a majority of the time; data exchange means for periodically storing signals supplied by said demodulating means, preventing acceptance of said signals by said multiplexing means and substituting therefor new signals to be multiplexed into the portion of the communication link signals previously occupied by the stored signals; signal loop means including a plurality of serially connected load means for accepting the stored signals from said data exchange means in serial multiplexed format for transmission to said load means and for returning substitute signals to said data exchange means; and said data exchange means comprising first and second units each of which periodically stores signals occurring at different relative periodic times and also comprising further multiplex means for combining the output signals of said first and second units before transmission to said signal loop means.

Claim 5

Apparatus as claimed in claim 2 wherein said data exchange means further includes variable delay means for delaying the signal, before substitution, an integral number of time periods, wherein a time period is equal to the time between storing signals by one of said data exchange units.

Claim 6

Apparatus as claimed in claim 2 wherein said signal loop means includes modulation means and demodulation means at the accepting and returning portions thereof.

Claim 7

Apparatus for use with a multiplex communication link comprising, in combination: input and output means for providing input signals to and output signals from the apparatus; demodulating means; multiplexing means; modulating means; means connecting said demodulating means, said multiplexing means and said modulating means between said input means and said output means so that multiplexed signals will pass uninterrupted therebetween a majority of the time; data exchange means for periodically storing signals supplied by said demodulating means, preventing acceptance of said signals by said multiplexing means and substituting therefor new signals to be multiplexed into the portion of the communication link signals previously occupied by the stored signals; signal loop means including a plurality of serially connected load means for accepting the stored signals from said data exchange means in serial multiplexed format for transmission to said load means and for returning substitute signals to said data exchange means; and error detection means for supplying extra synchronization signals to said signal loop and to said multiplex communication link upon detection of synchronization errors in either said communication link or said signal loop means when the multiplex signal being transmitted by said communication link includes periodically recurring synchronization signals.

Claim 8

Apparatus for use with a multiplex communication link comprising, in combination: input and output means for providing input signals to and output signals from the apparatus; demodulating means; multiplexing means; modulating means; means connecting said demodulating means, said multiplexing means and said modulating means between said input means and said output means so that multiplexed signals will pass uninterrupted therebetween a majority of the time; data exchange means for periodically storing signals supplied by said demodulating means, preventing acceptance of said signals by said multiplexing means and substituting therefor new signals to be multiplexed into the portion of the communication link signals previously occupied by the stored signals; signal loop means including a plurality of serially connected load means for accepting the stored signals from said data exchange means in serial multiplexed format for transmission to said load means and for returning substitute signals to said data exchange means; and error detection means for supplying extra synchronization signals to said signal loop and to said multiplex communication link upon detection of synchronization errors in either said communication link or said signal loop means when the multiplex signal being transmitted by said communication link includes periodically recurring synchronization signals.

Claim 9

Apparatus as claimed in claim 3 wherein said communication link is a closed loop and wherein said multiplex signals are amplitude modulated for synchronization and are phase modulated for data comprising, in addition: phase lock loop means connected to said demodulating means for receiving clock signals therefrom and for removing time occurrence jitter therefrom.

Claim 10

Apparatus as claimed in claim 3 wherein said communication link is a closed loop and wherein saidmultiplex signals are amplitude modulated for synchronization and are phase modulated for data comprising, in addition: phase lock loop means connected to said demodulating means for receiving clock signals therefrom and for removing time occurrence jitter therefrom.