Table of Contents

Glossary
A
B
C
D
E
F
G
H
I
K
L
M
N
O
P
R
T
W

Glossary


A

 

ABER

Bit Error Rate switching threshold

AC

Alternate Current

ADM

Add Drop Multiplexer

AIS

Alarm Indication Signal (1111...)

APS

Automatic Protection Switching

AU

Administrative Unit

AUXP

Auxiliary Pattern (1010...)

B

 

B2B

Back-to-back

BAT

Battery

BER

Bit Error Ratio

BIDL

Bi-Directional Loopback Alarm

C

 

CLI

Command Line Interface

CLNP

Connection less Network Protocol

CO

Central Office

CRC-4

Method for detection of bit errors (ITU-T Rec. G.704)

D

 

DC

Direct Current

DCC

Data Communications Channel

DCE

Data Circuit-terminal Equipment

DCN

Data Communications Network

DL

Downlink (towards user)

DLAS

Degraded Laser

DQUI

Degraded Quality on User Interface

DTE

Data Terminal Equipment

E

 

ECT

Equipment Craft Terminal

EOW

Engineering Order Wire

EEPROM

Electrical Erase Programmable Read Only Memory

EMC

Electromagnetic Compatibility

EPROM

Erase Programmable Read Only Memory

ES

End System

ES

Errored Seconds

ET

Exchange Termination

ETSI

European Telecommunication Standards Institute

F

 

F1

Optical line interface

F2

Electrical 2 Mbit/s interface

FA

Frame Alignment

FC

Failure Condition

FC/PC

Optical Connector

FP

Fabry Perot

FPGA

Field Programmable Gate Array

FTP

File Transfer Protocol

G

 

GUI

Graphical User Interface

H

 

HBER

High Bit Error Rate

HDB3

High Density Binary Code

HDLC

High-level Data Link Control

HW

Hardware

I

 

ICMP

Internet Control Message Protocol

IGMP

Internet Group Management Protocol

IEEE

Institute of Electrical and Electronics Engineers

IP

Internet Protocol

IS

Intermediate System

ISDN

Integrated Services Digital Network

ITU-T

International Telecommunication Union Standardization Bureau

K

 

KLM

Numbering scheme for container in SDH

L

 

LAP-D

Link Access Procedure on the D channel

LAN

Local Area network

LBER

Low Bit Error Rate

LCT

VT.100 compatible Local Craft Terminal

LD

Laser Diode

LED

Light Emitting Diode

LFA

Loss of Frame (BF) Alignment

LL2/LL3

Local Loop 2/3

LMF

Loss of Multiframe Alignment

LOS

Loss of Signal

LPS

Line Protection Switching

LTE

Line Termination Equipment

M

 

MAC

Medium Access

MD

Mediation Device

MF

Multiframe (G.704)

MIB

Management Information Base

MS

Multiplex Section

N

 

NC

Not Connected

NE

Network Element

NET

Network

NSAP

Network Service Access Point

NTE

Network Termination Equipment

NV

Non-Volatile

O

 

OC

Operating Center

OCT

Office Craft Terminal

ODF

Optical Distribution Frame

OFDLS

Optical Fibre Digital Line System (Associated LTE, NTE and fibre route)

OLOS

Optical LOS

OPOL

Optical Power out of Limit

ORX

Optical interface module RX

OSI

Open Systems Interconnection

OTX

Optical interface module TX

P

 

PABX

Private Automatic Branch Exchange

PC

Personal Computer

PCB

Printed Circuit Board

PDH

Plesiochronous Digital Hierarchy (ITU-T Rec. G.702)

R

 

RAL

Restricted Access Location

Rx

optical receiver

T

 

TAC

Technical Assistance Center

TCP

Transport Control Protocol

TIA

Telecommunication Industry Association

Tx

optical transmitter

W

 

www

World Wide Web