Abstract: A single fiber optical communication system (SFOCS) allows, in many operational scenarios, one-person deployment and recovery of optical links. Wavelength division multiplexing (WDM) is employed to provide full-duplex, bi-directional transmission. An optical subsystem achieves the wavelength multiplexing and demultiplexing while at the same time allowing for an unpolarized terminal design. Selection by the system of the WDM operating wavelengths between a pair of SFOCS terminals is performed without operator intervention.

Abstract: An asynchronous digital TDM multiplexer-demultiplexer combination at one communication terminal is capable of multiplexing N asynchronous input data signals having a random mixture of different bit rates into a transmitted synchronous data stream having a predetermined fixed data format and a given bit rate greater than the sum of the rates of the different rates and to demultiplex N asynchronous output data signals having the same random mixture of the different bit rates from a received synchronous data stream having the data format and the given bit rate, where N is an integer greater than 1.

Abstract: A common controller in the form of a programmed digital sequencer executes a series of instructions to control multiplexing-demultiplexing overhead channel format generation, frame synchronization stuff-destuff operation and automatic channel assignment in a digital TDM multiplexer-demultiplexer combination at one communication terminal to enable multiplexing N input data signals each having a predetermined bit rate into a transmitted synchronous data stream having a predetermined fixed data format and a given bit rate greater than the sum of the predetermined bit rates and to demultiplex N output data signals each having the predetermined bit rate from a received synchronous data stream having the data format and the given bit rate, where N is an integer greater than one.