Pertaining to a circuit that was designed and used for speech transmission , but to which other uses, such as digital data transmission , facsimile transmission, telegraph, or signaling superimposed on the speech signals, have been added by means of multiplexing . [ From Weik '89 ]
SPEECH PLUS
Meaning of SPEECH PLUS in English
Telecommunication standard terms English vocab. Английский словарь стандартных телекоммуникационных терминов. 2012