Glossary:

ATIS Telecom Glossary

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Select a term name to open its entry and any media references. Longer definitions end with a “Read More” link.

terminal

A device capable of sending, receiving, or sending and receiving information over a communications channel.

terminal access controller (TAC)

A host computer that accepts terminal connections, usually from dial-up lines, and that allows the user to invoke Internet remote log-on procedures, such as Telnet.

terminal adapter

An interfacing device employed at the "R" reference point in an ISDN environment that allows connection of a non-ISDN terminal at the physical layer to communicate with an ISDN network.
Note: Typically, a terminal adapter will support standard RJ-11 telephone connection plugs for voice and RS-232C, V.35 and RS-449 interfaces for data.

terminal data

Data maintained for each terminal including the current terminal location (and capabilities). [T1.244-1995]

terminal deregistration

The process by which a wireless terminal's previous location registration is canceled. [T1.702-1995] [T
1. Rpt34-1994]

terminal endpoint (TE) functional group

A functional group that includes functions broadly belonging to Layer 1 and higher layers of the ITU-T Recommendation X.200 Reference Model.
Note 1: The functions of a TE functional group are performed on various types of equipment, or combinations of equipment, such as digital telephones, data terminal equipment, and/or integrated work stations.
Note 2: Examples of TE functions are protocol-handling,… (Read More →)

terminal equipment

1. Communications equipment at either end of a communications link, used to permit the stations involved to accomplish the mission for which the link was established.
2. In radio-relay systems, equipment used at points where data are inserted or derived, as distinct from equipment used only to relay a reconstituted signal.
3. Telephone and telegraph switchboards and other centrally located… (Read More →)

terminal impedance

1. The impedance as measured at the unloaded output terminals of transmission equipment or a line that is otherwise in normal operating condition.
2. The ratio of voltage to current at the output terminals of a device, including the connected load.

terminal mobility

In commercial wireless networks, the ability of a terminal, while in motion, to access telecommunication services from different locations, and the capability of the network to identify and locate that terminal.

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