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Glossary
GL-26 Issue 2.0 December 1995
TDD
See
telecommunications device for the deaf
.
TDM
See
time division multiplex
.
telecommunications device for the deaf (TDD)
A device with a keyboard and display unit that connects to or substitutes for a phone. The TDD
allows a deaf or hearing-impaired person to communicate over the phone lines with other people
who have TDDs. It also allows a deaf person to communicate with the Intuity AUDIX system.
terminal
See
display terminal
.
terminal type
A number indicating the type of terminal being used to log on to the AT&T Intuity system. Terminal
type is the last required entry before gaining access to the AT&T Intuity display screens.
terminating resistor
A grounding resistor placed at the end of bus, line, or cable to prevent signals from being
reflected or echoed.
time division multiplex
A device which derives multiple channels on a single transmission facility by connecting bit
streams one at a time at regular intervals.
tip/ring
A term used to denote the analog telecommunications interface.
tone generator
A device acoustically coupled to a rotary phone, used to produce touch-tone sounds when
subscribers cannot use a regular touch-tone generating voice terminal.
traffic
The flow of attempts, calls, and messages across a telecommunications network.
translations
Software assignments that tell a system what to expect on a certain voice port or the data link, or
how to handle incoming data. They customize the AT&T Intuity system and switch features for
users.
transmission control protocol/internet program (TCP/IP)
A set of protocols developed by the Department of Defense to link dissimilar computers across
many kinds of networks. It is the protocol commonly used over Ethernet, as well as x.25,
networks. Although committed to an eventual migration to an Open Systems Interconnection
(OSI) architecture. TCP/IP currently divides networking functionality into only four layers: network
interface, Internet, transport, and application.
T/R
See
tip/ring
.
troubleshoot
The process of locating and correcting errors in computer programs. Also called
debug
.