Instruction manual

MERLIN LEGEND Communications System Release 5.0
Maintenance and Troubleshooting
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
alternate in polarity; otherwise, a bipolar violation
occurs. AMI is used in the DS1 interface.
analog
transmission
Mode of transmission in which information is
represented 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
automatically identifying a caller’s billing number and
transmitting that number from the caller’s local
central office to another point on or off the public
network.
application Software and/or hardware that adds functional
capabilities to the system. For example, MERLIN
Identifier is an application that provides caller
identification information (if available in the local area
or jurisdiction).
ARS (Automatic Route Selection) System feature that
routes calls on outside trunks according to the
number dialed and trunk availability.