ADCP-61-471 • Issue 4 • June 2000 • Preface

DFMS

Digital Facility Maintenance System

DLP

Detailed Level Procedure (TOP term)

DLX

DS1 Loop Extender module (BB system only)

DS1

Digital Signal - Level 1

DS2

Digital Signal - Level 2

DS3

Digital Signal - Level 3

DS3 MUX

DS3 Multiplexer module

DSX

Digital Signal Cross-Connect

DTE

Data Terminal Equipment

ESD

Electrostatic Discharge

ESF

Extended Super Frame

EV

Event

EXT

External

EXZ

Excessive Zeros

FCC

Federal Communications Commission

FE

Far End

FEND

Far End

GND

Ground

HDSL

High-bit-rate Digital Subscriber Line

HEMI

High Power HDSL Module

HiCap

High Capacity

HLXC

HDSL Loop Extender - Central Office module

HLXR

HDSL Loop Extender - Remote module

HRX

HDSL Repeater

HS

High Speed

HSP

High Speed Protect slot for EC1M module (in SONET system only)

HSW

High Speed Working slot for EC1M module (in SONET system only)

IS

In Service

IXL

Task Index List (TOP term)

KBPS

Kilobits Per Second

KFT

Kilo Feet

LAPB

Link Access Procedure Balanced

LE

Loop Extender

LEC

Local Exchange Carrier

LEC

Loop Extender Chassis

LED

Light Emitting Diode

LIU

Line Interface Unit

LMPTST

Lamp Test

LOP

Loss of Pointer

LOS

Loss of Signal

LOSW

Loss of Synch Word

LS

Low Speed

MBPS

Megabits Per Second

MJ

Major

MN

Minor

Page xiii

2000, ADC Telecommunications, Inc.