Terminal Adaptor TA terminal adapter <networking, hardware> (TA) Equipment used to adapt {Integrated Services Digital Network} (ISDN) {Basic Rate Interface} (BRI) channels to existing terminal equipment standards such as {EIA-232} and {V.35}. A Terminal Adaptor is typically packaged like a {modem}, either as a {stand-alone} unit or as an interface card that plugs into a computer or other communications equipment (such as a {router} or {PBX}). A Terminal Adaptor does not interoperate with a {modem}; it replaces it. [ISDN {FAQ}]. (1994-10-03)