Quality monitoring equipment for digital transmission links.

摘要

The equipment according to the invention is intended to the quality control at bit level of a digital connection in the presence of real traffic. The equipment respects the CCITT recommendations and is comprised of two control stations (SP, SS) located respectively at two ends of the digital connection (LT) and interconnected by a service liaison (LS). First and second control information related to transmitted raster groups (MTnP) and to received raster groups (MTnS), respectively, are calculated in stations and comparisons are carried out in order to detect transmission errors. The control information and the raster groups concerned by the transmission errors are transmitted from one station to another through the service liaison. The means are distributed amongst stations in order to process the raster groups concerned by the transmission errors, that is to say analyse at bit level the errors in erroneous rasters and to produce statistical information and recordings related to said errors.