Information can be gained on faulty operation of System No. 6 from overall operational tests of international circuits served by the system. Such tests can be performed by the use of the automatic transmission measuring and signalling testing equipment (A
ITU-T Q.295-1988 history
1988ITU-T Q.295-1988 9.1 Overall Test of Signalling System No. 6 - Specifications of Signalling System No. 6 (Study Group XI) 5 pp