Nortel Networks 400 4.0, BCM200 manual Getting started Acronyms Sheet 2, Acronym Description

26 Chapter 1 Getting started

Table 1 Acronyms (Sheet 2 of 3)

Acronym	Description
ASM	Analog station module (analog station media bay module)
ATA	Analog terminal adapter
BCM	Business Communications Manager
BRIM	Basic rate interface module (basic rate interface media bay module)
CAP	Central answering position
CFA	Carrier failure alarm
CLID	Calling line identification
CO	Central office
CSU	Channel service unit
CTM	Caller ID trunk module (caller ID trunk media bay module)
DDIM	Digital drop and insert MUX
DIMM	Dual in-line memory module
DMC	Digital mobility controller
DSM	Digital station module (digital station media bay module)
DSP	Digital signal processor
DSU	Data service unit
DTE	Data terminal equipment
DTM	Digital trunk module (digital trunk media bay module)
FEM	Fiber expansion module
FRU	Field replaceable unit
GASM	Global analog station module (global analog station media bay module)
GATM	Global analog trunk module (global analog trunk media bay module)
KEM	Key expansion module
KIM	Key indicator module
KRS	Keycode retrieval system (Nortel keycode retrieval system)
LAN	Local area network
LIU	Line isolation unit
MBM	Media bay module
MSC	Media services card
MWI	Message waiting indication
NIC	Network interface card
ONS	on-premise station
OSI	Open switch interval
PCI	Peripheral component interface
PEC	Processor expansion card
PSTN	Public switched telephone network
PSU	Power supply unit

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