Northern Telecom DMS-100 Series Maintenance Manual page 226

17-6 List of terms
LTC
line trunk controller
magnetic tape drive (MTD)
In a DMS switch, a device used to record DMS-100 Family data. You can
mount an MTD on a magnetic tape center (MTC) frame or an input/output
equipment (IOE). Also known as tape drive.
maintenance and administration position
See MAP.
maintenance level
See MTC.
MAP
Maintenance and administration position. A group of components that
provides a user interface between operating company personnel and the
DMS-100 Family switches. The interface consists of a visual display unit
(VDU) and keyboard, a voice communications module, test facilities, and
special furniture.
MAPCI
MAP command interpreter
message switch (MS)
A high-capacity communications facility that functions as the messaging
hub of the dual plane combined core (DPCC) of a DMS SuperNode
processor. The MS controls messaging between the DMS-Buses. The MS
concentrates and distributes messages and allows other DMS-STP
components to communicate directly with each other.
MS
message switch
MTC (maintenance level)
A MAP level used to access several areas of the DMS-100 switch. Areas
include central control (CC), peripheral modules (PM), the lines
maintenance subsystem (LNS), and other areas.
MTD
magnetic tape drive
297-1001-591 Standard 04.03 March 1999