Process for the individual monitoring of transmission sections of a communications transmission link, and apparatus for carrying out the process.

摘要

Process for the individual monitoring of transmission sections of a communications transmission link, in which additional signals used for bit error detection are recalculated during their regeneration, and apparatus for carrying out the process. To check monitoring circuits under remote control, the additional signals are formed differently during test mode than during normal monitoring mode. The criterion for the test mode is the reception of a predetermined number of such additional signals. The process and the apparatus can be advantageously used in transmission devices of the digital synchronous hierarchy. ……