TONE-FREQUENCY CHANNEL PARAMETER-MONITORING EQUIPMENT

The introduction of an increasing number of transmission systems (TS) into communications networks, the development of new communications sy stems having fundamental differences from previous systems, and an inc rease in the volume of data have all imposed more stringent requiremen ts on quality control of communications channels. This paper describes tone-frequency (F) channel test equipment capable of interacting with computer hardware and evaluating the quality of tone-frequency channe ls formed by different transmission systems as well as the suitability of such channels for transmitting both analog and digital data.