Equipment that (a) accommodates the transition from current manual and analog systems to fully automated digital systems and (b) provides for message switching , voice communications circuit switching , and the use of secure voice terminals, digital facsimile systems, and user digital voice terminals.
TRI TAC EQUIPMENT
Meaning of TRI TAC EQUIPMENT in English
Telecommunication standard terms English vocab. Английский словарь стандартных телекоммуникационных терминов. 2012