A device that connects a computer to an external digital communications line, such as an ISDN line. A terminal adapter is a bit like a modem, but whereas a modem needs to convert between analog and digital signals, a terminal adapter only needs to pass along digital signals.
TERMINAL ADAPTOR
Meaning of TERMINAL ADAPTOR in English
DAX English glossary of key connectivity terms. Английский глоссарий основных терминов по коммуникациям DAX. 2012