ADTRAN DSU III ARdc User Manual page 121

LATA
Local Access and Transport Area. One of 161 local geographical areas in the US within
which a local telephone company may offer telecommunications services—local or long
distance.
local DTE and loop test
A test initiated by the user that loops the DSU to the central office and back. This is used
to test the local DSU's DTE and local loop.
multi-point
A communications arrangement in which multiple devices share a common transmission
channel, although only one may transmit at a time. Also referred to as multi-drop.
nonvolatile memory
Memory that is not lost when the power is shut off.
out-of-band
Signaling that is separated from the channel carrying information (voice, data, video,
etc.). Typically the separation is accomplished by a filter. The signaling includes dialing
and other supervisory signals.
parity bit
A binary bit appended to an array of bits to make the sum of all the bits always odd or
always even.
point-to-point
A private circuit, conversation, or teleconference in which there is one person at each end,
usually connected by some dedicated transmission modem.
read only memory
ROM. A memory device which is programmed at the factory and whose contents thereaf-
ter cannot be altered.
remote configuration
A feature designed into ADTRAN DSU/CSU products that allows a remote DSU/CSU to
be configured from a local DSU/CSU or VT 100 compatible terminal.
61200270L1-1 DSU III ARdc User Manual
Glossary
Glossary-9