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The following list defines acronyms and other abbreviations used in this handbook.
10BaseT
Standard 10 megabits per second local area network over unshielded twisted pair copper wire
100BaseT
Standard 100 megabits per second ethernet network
2R
Reshaping and regeneration
3R
Reshaping and regeneration and retiming
A
A-side
ACO
Alarm Cutoff
ADM
Add-Drop Multiplex
ANSI
American National Standards Institute
APD
Avalanche photo diode
APS
Automatic protection swiching
ATM
Asynchronous transfer module
ATO
Assembled to order
B
B-side
BER
Bit error rate
Bits/s
Bits per second (see also bps)
BLSR
Bidirectional line switched ring
BM
Bridge module
BOL
Beginning of life
bps
Bits per second (see also Bits/s)
C
Celsius
CAN
Controller area network
CFM
Collector Filter module
CFR
Code of Federal Regulations
CIM
Communication Interface module
CLEI
Common language equipment identifier code
CLIP
Client Layer Interface Port module
CMX
Connection Module X
CMY
Connection Module Y
CPE
Customer premises environment
dB
decibel
dBm
decibel referring to 1 milliwatt
DCC
Data communication channel
DCN
Data communication network
DFM
Dummy Filter module
DNAM
Dummy Network Adaptation module
DRAM
Dynamic random access memory
DWDM
Dense wavelength division multiplexing
EDFA
Erbium doped fiber amplifier
EIA
Electronic Industries Association
EMC
Electromagnetic compatibility
EMI
Electromagnetic interference
EOL
End of life
ESD
Electrostatic discharge
ETS
European Telecommunications Standard
ETSI
European Telecommunications Standard Institute
F
Fahrenheit
FCC
Federal Communications Commission
FDI
Forward Defect Indication (this signal is used to activate the switching to the protection path)
GMT
Greenwich Mean Time (historic expression for Universal Time Coordinated UTC)
HA
High-Alarm
HAT
High-Alarm Threshold
HDLC
High-level data link control
HFM
Hub Filter module
HTML
Hypertext markup language
HW
High-Warning
HWT
High-Warning Threshold
ID
Identifier
IEC
International Electrotechnical Commission
IEEE
Institute of Electrical and Electronics Engineers
I/O
Input/Output
IP
Internet protocol
IrDA
Infrared Data Association
ITU
International Telecommunications Union
ITU-T
International Telecommunications Union, Telecommunication standards sector
LA
Low-Alarm
LAN
Local area network
LAT
Low-Alarm Threshold
LCD
Liquid crystal display
LM
Line module
LOC
Loss of channel (i.e. in case of protected operation: failure on both working and protection paths)
LW
Low-Warning
LWT
Low-Warning Threshold
Mbps
Megabits per second
MCU
Multichannel Unit
MHz
Megahertz
NAM
Network adaptation module
NCB
Network Control Board
NE
Network element
NEBS
Network Equipment Building Standard
Neid
Network Element Identifier
NFPA
National Fire Protection Association
NMS
Network management system
NVRAM
Non-volatile random access memory
OC
Optical carrier
OC-3
Optical carrier, level 3 (same bit rate as STM-1)
OC-12
Optical carrier, level 12 (same bit rate as STM-4)
OC-48
Optical carrier, level 48 (same bit rate as STM-16)
ONS
Optical networking system
P
Protection
PC
Personal Computer
PIN-Diode
P-intrinsic-N diode (optical detector diode)
PM
Performance Monitor
QPP
Qeyton proprietary protocol
RAM
Random access memory
RJ-12
Registered jack #12 (6-pin)
RJ-45
Registered jack #45 (8-pin)
RS-232
Recommended standard #232 (ANSI electrical interface for serial communication)
Rx
Receive
SCU
Single-Channel Unit
SDH
Synchronous digital hierarchy
SMF
Single-mode fiber
SNM
Sub-Network Manager
SNMP
Simple Network Management Protocol
SNTP
Simple Network Timing Protocol
SONET
Synchronous optical network
STM
Synchronous transport module
STM-1
Synchronous transport module, level 1 (same bit rate as OC-3)
STM-4
Synchronous transport module, level 4 (same bit rate as OC-12)
STM-16
Synchronous transport module, level 16 (same bit rate as OC-48)
TAC
Technical Assistance Center
TCP/IP
Transmission control protocol / Internet protocol
THz
Terahertz
TIA
Telecommunication Industry Association
TM
Termination module
TMN
Telecommunication management network
Tx
Transmit
UL
Underwriters´ Laboratories
URL
Uniform Resource Locator (Internet address, including specific document location)
UTC
Universal Time Coordinated (formerly known as Greenwich Mean Time GMT)
W
Watts
WAN
Wide area network
WWW
World Wide Web
XC
Cross connect
Posted: Fri Jan 4 17:34:42 PST 2002
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