PROCESS FOR COUPLING AND UNCOUPLING SIGNALS INTO AND OUT OF THE SUB-AREAS OF SUPPLEMENTARY SIGNALS OF TRANSPORT MODULES OF A SYNCHRONOUS DIGITAL SIGNAL HIERARCHY

摘要

ABSTRACTThe present invention relates to a process foruncoupling signals from at least one sub-area of the supplementarysignals and to couple signals into at least one sub-area of thesupplementary signals of transport modules of a synchronousdigital signal hierarchy as in CCITT Draft Recommendations G.70X,G.70Y, and G.70Z. When uncoupling, this task has been solved inthat a sub-area of the secondary signals is uncoupled from thetransport module in a demultiplexing and spreading system, andduring a period of time is spread within the framework. Thespread signal is broken down, for example, into the secondarysignals of the selected sub-area that are associated with thetransport modules of the lowest stage of the hierarchy that arecontained in the transport module. For coupling, these steps ofthe process are carried out in the reverse and opposite sense.These secondary signals are moved onto the lines of the bus.Control signals, fed in externally or generated in thedemultiplexing and spreading system, are transmitted in a sub-bus.After addresses have been input, bytes or groups of bytes can bepicked off the bus through the customer intersection points andundergo further processing. This process can be applied insynchronous digital signal hierarchies such as NNI (network nodeinterface).