Abstract: A method of synchronizing data in a communications system includes generating a composite signal comprising a serial stream of data partitioned in one or more frames, and transmitting the composite signal to a receiver. Multiphase clock signals are generated. The composite signal received at the receiver is compared with each of the multiphase clock signals until either sustained coincidence therebetween is achieved or sustained non-coincidence is achieved, thereby synchronizing the receiver to bit boundaries in the composite signal and to one or more of the clock phase signals. One or more bit templates at the receiver is correlated with one or more corresponding bit templates in the composite signal received at the receiver to determine where frames start in the composite signal, thereby synchronizing the receiver to the one or more frames in the composite signal.

Abstract: A method of synchronising data in a communications system (10) comprises the steps of: (a) Generating at transmitting means (20) a composite signal comprising a serial stream of data partitioned in one or more frames; (b) transmitting the composite signal through communicating means (50) to receiving means (30); (c) generating multiphase clock signals; (d) comparing the composite signal received at the receiving means with each of the multiphase clock signals until either sustained coincidence therebetween is achieved or sustained non-coincidence is achieved, thereby synchronising the receiving means to bit boundaries in the composite signal and to one or more of the clock phase signals; (e) correlating one or more bit templates at the receiving means with one or more corresponding bit templates in the composite signal received at the receiving means to determine where frames start in the composite signal, thereby synchronising the receiving means to the one or more frames in the composite signal.

Abstract: A digital switching arrangement for use in a telecommunications exchange handling channels of digital information in time division multiplex form. The digital switching arrangement being particularly suited for use in stored program processor controller environments. The arrangement comprises a digital switching network and a control equipment. The control equipment includes an input queue and an output queue each arranged to store processor input and output messages respectively. The control arrangement is arranged to asynchronously process each output message to process switching network path connections and to generate in the input queue an input message indicative of the actions performed. Each output message includes switching network identification information indicative only of the identities of the incoming and outgoing exchange highways and channels to be involved in the switching network path to be processed.