Instruction manual

MERLIN LEGEND Communications System Release 5.0
Installation
555-650-140
Issue 1
June 1997
Glossary
Page GL-2
adjunct Optional equipment used with the communications
system, such as an alerting device or
modem that
connects to a multiline telephone or to an extension
jack.
ALS (Automatic Line Selection) Programmed order in
which the system makes outside lines available to a
user.
AMI (alternate mark inversion) Line coding format in
which a binary one is represented by a positive or
negative pulse, a binary zero is represented by no
line signal, and subsequent binary ones must alter-
nate in polarity; otherwise, a
bipolar violation occurs.
AMI is used in the
DS1 interface.
analog
transmission
Mode of transmission in which information is repre-
sented in continuously variable physical quantities
such as amplitude, frequency, phase, or resistance.
See also digital transmission
.
analog data station See modem data station
.
ANI (automatic number identification) Process of auto-
matically identifying a caller’s billing number and
transmitting that number from the caller’s local cen-
tral office to another point on or off the public net-
work.
application Software and/or hardware that adds functional capa-
bilities to the system. For example, MERLIN Identi-
fier is an application that provides caller identification
information (if available in the local area or jurisdic-
tion).
ARS (Automatic Route Selection) System feature that
routes calls on outside trunks according to the num-
ber dialed and trunk availability.