AT&T MERLIN LEGEND Reference page 145

G l o s s a r y
d i g i t a l
The representation of information in discrete elements
such as off and on or 0 and 1. See a/so analog
transmission
Digital Subscriber Line (DSL)
An ISDN Basic Rate, 2-wire U-interface between the
5ESS central office and the MERLIN LEGEND system.
The term "Digital Subscriber Line" is used
synonymously with the term "BRI line. " Each DSL
consists of two 64-Kbps B-channels and one 16-Kbps
D-channel. The MERLIN LEGEND system supports two
Directory Numbers for each DSL.
digital transmission
A mode of transmission in which the information to be
transmitted is first converted to digital form and then
transmitted as a serial stream of pulses. See also
analog transmission
Direct-Line Console (DLC)
An answering position used by system operators to
answer calls, transfer calls, make calls, set up
conference calls, and monitor system operations. Calls
can ring on any of the line buttons, and several calls
can ring simultaneously (unlike
are sent to a common
is available to receive a call).
Directory Number (DN)
Usually the Directory Number is the number that was
dialed to reach the destination. However, sometimes
the CO may change the number to make routing
easier, In either case, when an incoming call arrives at
a MERLIN LEGEND system, the CO presents the DN to
the MERLIN LEGEND system,
F
factory setting
The default state of a device or feature if the user does
not choose an optional setting.
feature
A function or service provided by a hardware or
software product,
G L - 2
the where calls
QCC
QCC queue and wait until a QCC
feature code
A code entered on a dialpad to activate a feature, For
example, to use Last Number Dial, a user presses the
Feature button and dials 84, When not using the
Feature, the user dials #84,
feature screen
A display screen on digital display telephones that
provides quick access to commonly used features.
H
home screen
The "home base" of the display screen on digital
telephones, which shows time, date and call
information, and when a feature is in use,
Hybrid/PBX mode
A mode of operation in which the communications
system uses trunk pools and Automatic Route
Selection (ARS). The Hybrid/PBX mode also provides a
single interface to users for both internal and external
calling.
I
Inside dial tone
A tone users hear when they are connected to an
intercom line.
J
jack
A device, accessed by inserting a plug, that is used to
terminate the permanent wiring of a circuit,
K
Key mode
A mode of operation in which the communications
system uses direct facility terminations on line buttons
with a separate path for internal calling.