Setting up and Initial Testing of Digital Channels on an International Digital Path or Block - General Maintenance Principles - Maintenance of International Transmission Systems and Telephone Circuits
The definition of a digital channel is given in Recommendation M.300.Procedures in CCITI Recommendation M.555 for bringing-into-service digital blocks and digital paths are adequate to ensure satisfactory operation of digital channels which are provided on the respective digital blocks or paths.No specific tests are required for individual digital channels.