TA Terminal Adapter. Allows existing non-ISDN terminals to operate on ISDN lines. It provides conversion between a non ISDN terminal device and the ISDN user/network interface.
TAC Trunk Access Class
TANDEM An exchange used to switch network traffic between other nodes.
TAPI Telephony Applications Programmers Interface. A standard for CTI developed by Microsoft and Intel associated with PC based computer systems. It is an open standard which permits the direct control of a telephone from a windows based application.
TCP/IP Transport Control Protocol/Internet Protocol
TE1 Terminal Equipment Type 1. ISDN-compatible terminals. A TE1 can be an ISDN telephone, a personal computer capable of working with ISDN, a video-phone etc any device that can attach to and work with ISDN.
TELNET Network terminal emulation protocol. Simple protocol to allow programs to exchange ASCII and control characters over network interfaces, as though the data were being produced/displayed by a normal terminal.
TERMINAL Any device capable of sending or receiving information over a communication channel.
TIE LINE WORKING This facility lets you use leased lines to create a private network.
TJF Test Jack Frame (See MDF).
TRUNK An individual circuit, provided by either a public network operator or via a private network capable of carrying an individual telephone call (either incoming or outgoing).
TRUNK PERFORMANCE A measurement of the efficiency and utilisation of a particular trunk.
TS Trunk Select. A button on a terminal which can be pressed to answer incoming trunk calls on that button.
TSAPI Telephony Services Applications Programmers Interface. The equivalent of TAPI in a Novell environment where control of the telephone is initiated over the LAN rather than by direct connection to the telephone.
TWO-WIRE PHONES Two wire phones or POT plain ordinary telephone are a low cost solution to some systems this require extensions with less sophisticated features that key stations. Some systems require additional cards in the CPU central processing unit to enable you to use two wire phones so careful calculation may be required.
