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MERLIN LEGENDCommunications System Release 6.1
System Planning
555-661-112
Issue 1
August 1998
Glossary
Page GL-2
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 data
station
See
modem data station.
analog multiline
telephone
Also known as the MERLIN multiline telephone. A
telephone that transmits and receives analog signals and
has a number of line buttons.
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
.
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 facilities according to the number dialed
and line/trunk availability. To initiate ARS, the user dials a
dial-out code
, also called an “ARS access code.”
ASCAP (American Society of Composers, Artists, and Producers)
Ascend Pipeline
25PX/75PX
An ISDN-BRI bridge/router that enables high-speed
Internet access over a digital facility. It makes outgoing
calls only.
ASN (AT&T Switched Network) AT&T telecommunications
services provided through an Integrated Digital Services
Network Primary Rate Interface (ISDN-PRI) trunk,
Accunet
switched digital service,
Megacom
,
Megacom 800
,
Software Defined Network (
SDN
), Multiquest, and Shared
Access for Switch Services (SASS).
asynchronous
data transmission
A method of transmitting a short bitstream of digital data,
such as printable characters represented by a 7- or 8-
bit
ASCII code. Each string of data bits is preceded by a start
bit and followed by a stop bit, thus permitting data to be
transmitted at irregular intervals. See also
synchronous
data transmission
.
AT&T Attendant Application with equipment that connects to one or more
tip/ring
extension jacks and automatically answers
incoming calls with a recorded announcement; directs calls
in response to touch tones.