METHOD FOR CONTROLLING CONDITIONAL CONNECTIONS IN A SYNCHRONOUS DIGITAL TELECOMMUNICATIONS SYSTEM

摘要

The invention relates to a method for controlling a conditional connection in a synchronous digital telecommunications system (SDH), in which a signal has a frame structure consisting of a predetermined number of bytes of fixed length and comprising a pointer indicating the phase of the payload within the frame structure. The method comprises transmitting condition information (eb) relating to a useful signal, on the basis of which information the connection is made. In order to enable control of conditional connections in a synchronous digital telecommunications network without using the effective capacity of the network, the condition information (eb) is transmitted at least in one byte belonging to the overhead (SOH or POH) section of the frame structure.