NTP
                        NTP 297-1001-107                  PAGE 17
                       PREL., ISSUE 01D01
                          June 22, 1978



7.   ABBREVIATIONS


ACD   -  Alarm Control and Display
ATT   -  Automatic Trunk Testing
CC    -  Central Control
CCC   -  Central Control Complex
CDM   -  Customer Data Modification
CMC   -  Central Message Controller
DMO   -  Data Modification Order
DMS   -  Digital Multiplex System
I/O   -  Input/Output
IOC   -  Input/Output Controller
MAP   -  Maintenance and Administration Position
MDF   -  Main Distribution Frame
MMB   -  Man Made Busy
MTU   -  Magnetic Tape Unit
NM    -  Network Module
NMP   -  Network Management Position
NTP   -  Northern Telecom Practice
ODM   -  Office Data Modification
OM    -  Operation Measurement
PM    -  Peripheral Module
POP   -  Performance Oriented Practice
RR    -  Routing and Reporting
SB    -  System Busy
TTP   -  Trunk Test Position
TTY   -  Teletype
VDU   -  Visual Display Unit




















                         DMS 100 FAMILY
        MAINTENANCE AND ADMINISTRATION TOOLS DESCRIPTION
               (c) NORTHERN TELECOM LIMITED, 1978