Acronyms

Numerics
 
10BaseT
standard 10 megabit per second local area network over unshielded twisted pair copper wire
100BaseT
standard 100 megabit per second Ethernet network
100BaseTx
specification of 100BaseT that supports full duplex operation

A
 
ACO
Alarm Cutoff
ACT/STBY
Active/Standby
ADM
Add-Drop Multiplexer
AIC
Alarm Interface Controller
AID
Access Identifier
AIP
Alarm Interface Panel
AIS
Alarm Indication Signal
AIS-L
Line Alarm Indication Signal
AMI
Alternate Mark Inversion
ANSI
American National Standards Institute
APS
Automatic Protection Switching
ARP
Address Resolution Protocol
ATAG
Autonomous Message Tag
ATM
Asynchronous Transfer Mode
AWG
American Wire Gauge

B
 
B8ZS
Bipolar 8 Zero Substitution
BER
Bit Error Rate
BIC
Backplane Interface Connector
BIP
Bit Interleaved Parity
BITS
Building Integrated Timing Supply
BLSR
Bi-directional line switched ring
BNC
Bayonet Neill-Concelman (coaxial cable bayonet locking connector)
BPDU
Bridge Protocol Data Unit

C
 
CAT 5
Category 5 (cabling)
CCITT
Consultative Committee International Telegraph and Telephone (France)
CEO
Central Office Environment
CEV
Controlled Environment Vaults
CLEI
Common Language Equipment Identifier code
CLNP
Correctionless Network Protocol
CMIP
Common Management Information Protocol
cm
centimeter
COE
Central Office Environment
CORBA
Common Object Request Broker Architecture
CoS
Class of Service
CPE
Customer Premises Environments
CSU
Channel Service Unit
CTAG
Correlation Tag
CTC
Cisco Transport Controller

D
 
DCC
Data Communications Channel
DCN
Data Communications Network
DCS
Distributed Communications System
DRAM
Dynamic Random Access Memory
DS-1
Digital Signal Level One
DS-3
Digital Signal Level Three
DS1-14
Digital Signal Level One (14 ports)
DS1N-14
Digital Signal Level One (N-14 ports)
DS3-12
Digital Signal Level Three (12 ports)
DS3N-12
Digital Signal Level Three (N-12 ports)
DS3XM-6
Digital Service, level 3 Trans Multiplexer 6 ports
DSU
Data Service Unit
DSX
Digital Signal Cross Connect frame

E
 
EDFA
Erbium Doped Fiber Amplifier
EFT
Electrical Fast Transient/Burst
EIA
Electrical Interface Assemblies
ELR
Extended Long Reach
EMI
Electromagnetic interface
EML
Element Management Layer
EMS
Element Management System
EoMPLS
Ethernet over Multiprotocol Label Switching
EOW
Express Orderwire
ERDI
Enhanced Remote Defect Indicator
ES
Errored Seconds
ESD
Electrostatic Discharge
ESF
Extended Super Frame
ETSI
European Telecommunications Standards Institute

F
 
FC
Failure Count
FDDI
Fiber Distributed Data Interface
FE
Frame Bit Errors
FG1
Frame Ground #1(pins are labeled "FG1," "FG2," etc.)
FSB
Field Service Bulletin

G
 
Gb/s
Gigabits per second
GBIC
Gigabit Interface Converter
GR-253-CORE
General Requirements #253 Council Of Registrars
GR-1089
General Requirements #1089
GUI
Graphical User Interface

H
 
HDLC
High-Level Data Link Control

I
 
IEEE
Institute of Electrical and Electronics Engineers
IETF
Internet Engineering Task Force
IP
Internet Protocol
IPPM
Intermediate-Path Performance Monitoring
I/O
Input/Output
ITU-T
The International Telecommunication Union- Telecommunication Standards Sector
IXC
Interexchange Carrier

J
 
JRE
Java Runtime Environment

L
 
LAN
Local Area Network
LCD
Liquid Crystal Display
LDCC
Line Data Communications Channel
LOP
Loss of Pointer
LOS
Loss of Signal
LOF
Loss of Frame
LOW
Local Orderwire
LTE
Line Terminating Equipment
LVDS
Low Voltage Differential Signal

M
 
MAC
Media Access Control
Mb/s
Million bits per second, or Million bytes per second
MHz
Megahertz
MIB
Management Information Bases
MIME
Multipurpose Internet Mail Extensions
Mux/Demux
Multiplexer/Demultiplexer

N
 
NE
Network Element
NEL
Network Element Layer
NEBS
Network Equipment-Building Systems
NML
Network Management Layer
NMS
Network Management System

O
 
OAM&P
Operations, Administration, Maintenance, and Provisioning
OC
Optical carrier
OOS AS
Out of Service Assigned
OSI
Open Systems Interconnection
OSPF
Open Shortest Path First
OSS
Operations Support System
OSS/NMS
Operations Support System/Network Management System

P
 
PCM
Pulse Code Modulation
PCMCIA
Personal Computer Memory Card International Association
PCN
Product Change Notices
PDI-P
STS Payload Defect Indication-Path
POP
Point of Presence
PM
Performance Monitoring
PPMN
Path-Protected Mesh Network
PSC
Protection Switching Count
PSD
Protection Switching Duration
PTE
Path Terminating Equipment

Q
 
QoS
Quality of Service

R
 
RAM
Random Access Memory
RDI-L
Remote Defect Indication Line
RES
Reserved
RJ45
Registered Jack #45 (8 pin)
RMA
Return Material Authorization
RMON
Remote Network Monitoring
RPR
Resilient Packet Ring
RS232
Recommended Standard #232 (ANSI Electrical Interface for Serial Communication
Rx
Receive

S
 
SCI
Serial Communication Interface
SCL
System Communications Link
SDCC
Section Data Communications Channel
SDH/SONEt
Synchronous Digital Hierarchy/Synchronous Optical Network
SEF
Severely Errored Frame
SELV
Safety Extra Low Voltage
SES
Severely Errored Seconds
SF
Super Frame
SFP
Small Factor-Form Pluggable
SML
Service Management Layer
SMF
Single Mode Fiber
SNMP
Simple Network Management Protocol
SNTP
Simple Network Time Protocol
SONET
Synchronous Optical Network
SPE
Synchronous Payload Envelope
SSM
Synchronous Status Messaging
STA
Spanning Tree Algorithm
STP
Shielded Twisted Pair
STS-1
Synchronous Transport Signal Level 1
SWS
SONET WAN Switch
SXC
SONET Cross Connect ASIC

T
 
TAC
Technical Assistance Center
TBOS
Telemetry Byte Oriented Serial protocol
TCA
Threshold Crossing Alert
TCC+
Timing Communications and Control+ Card
TCP/IP
Transmission Control Protocol/Internet Protocol
TDM
Time Division Multiplexing
TDS
Time Division Switching
TID
Target Identifier
TL1
Transaction Language 1
TLS
Transparent LAN service
TMN
Telecommunications Management Network
TSA
Time Slot Assignment
TSI
Time-Slot Interchange
Tx
Transmit

U
 
UAS
Unavailable Seconds
UDP/IP
User Datagram Protocol/Internet Protocol
UID
User Identifier
UTC
Universal Time Coordinated
UTP
Unshielded Twisted Pair

V
 
VDC
Volts Direct Current
VLAN
Virtual Local Area Network
VPN
Virtual Private Network
VT1.5
Virtual Tributary equals 1.544 megabits per second

W
 
WAN
Wide Area Network
W
Watts

X
 
XC
Cross Connect
XCVT
Cross-connect Virtual Tributary
X.25
Protocol providing devices with direct connection to a packet switched network