Northern Telecom Meridian 1 Installation And Maintenance Manual page 217

List of terms Page 207 of 220
ISM Incremental software management. Permits precise definition of user
capacity and coverage.
LID See System LID.
M7310 terminal See Administration Terminal.
Main Distribution Frame Frame-mounted BIX modules that cross-
connect Meridian 1 terminations. All Meridian Companion wiring connects to
the Meridian 1 system through a Main Distribution Frame.
Maintenance Maintenance functions provide system backup and restore
functions as well as diagnostic features for the system, cards, and devices.
maintenance cables Two cables, one for the CMLC and one for the
CMRC, that allow a defective card to be removed without affecting operation
of other cards.
MCRA See Multiple Call Arrangement Allowed.
MCRD See Multiple Call Arrangement Denied.
MDF See Main Distribution Frame.
Message Waiting Indicator A visual or audible telephone set indicator
that alerts the user to the fact that a message is waiting.
Multiple Appearance Directory Number (MADN) A host switch
feature that allows the assignment of the same host switch telephone number
to any number of lines that are wired to the host switch.
Multiple Call Arrangement Allowed Prevents access to a conversation
on a portable telephone from the corresponding wireline set. The portable
telephone user can originate and receive calls when a set sharing the same DN
is on a call.
Multiple Call Arrangement Denied Allows access to a conversation on
a portable from the corresponding wireline set. The wireline user can listen in
on the portable telephone user's calls.
MWI See Message Waiting Indicator.
password A specific sequence of digits entered from the Administration
Terminal dialpad or through Companion Manager to gain access to Meridian
Meridian Companion Installation and Maintenance Guide