Download AS2000: The Basics

Acronyms and Definitions
T
T1
Digital signal level 1. A 24
channel, 1.544 Mbit/s digital line
used for voice and/or data
transmission. T1 uses two
twisted-pair conductors providing
full duplex transmission.
T3
Digital signal level 3. A digital line
that can carry up to 28 T1
channels and operate at 44.736
Mbit/s. Also known as DS3.
TA
Terminal Adapter—An ISDN
customer premises equipment
(CPE) which provides pre-ISDN
devices with standard non-ISDN
interfaces, such as tip and ring or
RS-232, to be connected to a BRI or
PRI access line. The terminal
adapter performs signalling
conversion so non-ISDN equipment
can establish connections via the
ISDN D-channel as well as
conversion of the voice or data
signal for transport via the ISDN Bchannel (analogous to a DSU).
Glossary-46
TABS
See Telemetry Asynchronous
Block Serial (TABS).
TAC
T1 Aggregate and Channel Service
Unit (TAC). Also Verilink’s
Technical Assistance Center @ 1(800) 837-4546, Ext: 333.
telco
Telephone company.
telecommunications
A term that describes voice and
data communications.
Telemetry Asynchronous Block Serial
(TABS)
TABS is an AT&T TR 54016
Standard point-to-point or multipoint polled communication
management protocol supported
by all Verilink controller modules.
telephone company (telco)
A company that provides its
customers with a digital or analog
communications line.
telephone company (telco) register
A performance data register from
which either a telco or customer
operator can retrieve data, but
only a telco operator can reset.
Telnet
Telnet is a TCP/IP protocol that
defines a client/server mechanism
for emulating terminal sessions.
terminal
An input/output device that is
used to communicate with a
computer. A terminal must have a
keyboard and a display.
Verilink Access System 2000: Basics