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Glossary
TA
~ WSIU
GL-12 Strata DK Programming 5/99
TA Terminal Adapter or ISDN modem that converts PC and other types of protocol into
a signal that works with ISDN. Generally, TAs support RJ-11 voice ports and RS-
232C or V.35 or V.449 data interfaces.
T1/DS-1
See RDTU.
TCIU1 Caller ID—An optional PCB that provides the Caller ID option in the Strata
DK424.
TCIU2 Caller ID—An optional PCB that provides the Caller ID option in the Strata DK40i.
TCOU Four-Circuit Loop Start CO Line Board— An optional PCB providing four loop
start CO line circuits in the Strata DK40i.
TDDU Four-Circuit DID Line Digital Telephone Interface Unit— An optional PCB
providing four DID line circuits in the Strata DK40i.
TE Terminal Equipment. This refers to devices using ISDN service (telephones, faxes,
computers, etc.). TE1 supports ISDN formats with S/T or U-type intefaces.
TSPI Telephony Service Provider Interface.
TSIU RS-232 Ports—An optional PCB that provides up to two RS-232 interface ports
(modular jacks) enabling the DK40i to connect to various hardware devices.
TTY Flexible RS-232 port which can be used for maintenance SMDI and MIS (ACD).
U Interface A single twisted pair of copper wire on an RJ-11 jack. The wiring is identical to
POTS, with different signaling. Only one U-interface device can be attached per
line.
Universal slot Slots in a telephone KSU/cabinet that are used for a variety of optional PCBs.
WSIU Serial Interface Board (DK14)—Provides two serial ports for either a Station
Message Detail Recording (SMDR) device or a maintenance terminal or modem, or
Caller ID interface.
Term Definition