AT&T MERLIN LEGEND Reference page 146

G l o s s a r y
L
light-emitting diode (LED)
A semiconductor device that produces light when
voltage is applies. LEDs show the operational status of
hardware components, the results of maintenance
tests, the alarm status of circuit packs, and the
activation of telephone features.
lines
Lines are the representations that appear on MERLIN
LEGEND telephones. They are used to place and
receive calls and can be put into pools. Except for the
800 CO-BRI and the 100D modules, all line modules
have a one-to-one correspondence between lines and
ports. On the 800 CO-BRI module, 8 ports provide 16
B-channels for transmission. In the MERLIN LEGEND
system each B-channel is mapped to a line with a
separate dial plan number. Therefore, each 800 CO-
BRI module is assigned 16 lines.
line numbering
A numbering sequence used to identify station and
trunk locations on the communications system control
unit.
M
module
A module in the control unit provides the capability to
connect telephone company trunks and/or telephones
to the system,
Music-on-Hold
A customer-provided music source or Magic on Hold
connected to the communications system via a loop-
start (LS) jack, Most Music-on-Hold equipment is
designed for LS operation,
N
network
A configuration of communications devices and
software connected for information interchange.
network interface
Hardware, software, or both that links two systems in
an interconnected group of systems, for example,
between the local telephone company and a PBX.
P
personal line
A telephone company line that rings only
telephone.
p o o l
On a Hybrid/PBX system, a grouping of outside trunks
that users can choose with multiple pool buttons or by
dialing access codes on a System Access button on
the telephone. Pools are also used by the Automatic
Route Selection (ARS) feature to choose the least
expensive method to route a call.
port
A point of access into a communications system,
computer, network, or other electronic device.
Primary Rate Interface (PRI)
A standard interface that specifies the protocol used
between two or more communications systems. PRI
runs at 1,544 Mbps and, as used in North America,
provides twenty-three 64-kbps B-channels (voice or
data) and one 64-kbps D-channel (signaling) The D-
channel is the 24th channel of the interface and
contains multiplexed signaling information for the other
23 channels.
Q
Queued Call Console (QCC)
An answering position available to MLX-20L telephone
in the Hybrid/PBX mode. The QCC is used
users only
by system operators to answer and direct (transfer)
calls, serve as a message center, and monitor system
operation. Calls are sent to a common QCC queue
where they wait until a QCC is available to receive a
call (unlike the DLC where calls can ring on any of the
line buttons, and several calls can ring simultaneously).
at the user's
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