Abbreviations

700-701-100-02

 

 

ABBREVIATIONS

AIS

Alarm Indication Signal

LL

Local Loopback

ALM

Alarm

LOC

Local

ANSI

American National Standards Institute

LOC

Loss of Clock

AWG

American Wire Gage

LOSW

Loss of Sync Word

BER

Bit Error Rate

LPBK

Loopback

C

Centigrade

LTU

Line Termination Unit

COM

Communication

M34F

M-type 34-pin Female Connector

CRC

Cyclic Redundancy Check

MAR

Margin

CTS

Clear To Send

Mbps

Megabits per second

D15F

D-type 15-pin Female Connector

MHz

Megahertz

D25F

D-type 25-pin Female Connector

mm

millimeter

D9F

D-type 9-pin Female Connector

NC

Normally Closed

dB

Decibel

NO

Normally Open

DCE

Data Communications Equipment

NTU

Network Termination Unit

Det

Detector

NVRAM

Non-volatile Random Access Memory

dnl

Download

Nx64k

Number (N) of 64 kbps DS0 time slots

 

 

 

mapped to a data port.

DS0

Digital Service, Level 0 (64 kbps)

Op

Operation

DSR

Data Set Ready

PFO

Power Feed Open

DTE

Data Terminal Equipment

PFS

Power Feed Short

DTR

Data Terminal Ready

ppm

pulse per minute

EMC

Electromagnetic Compliance

PRBS

Pseudorandom Bit Sequence

EMI

Electromagnetic Interference

RAM

Random Access Memory

EMS

Exchange Office Management Shelf

REM

Remote

EMU

Exchange Office Management Unit

RL

Remote Loopback

ES

Errored Second

RLSD

Received Line Signal Detector

ETR

ETSI Technical Report

RTS

Ready to Send

ETSI

European Telecommunications Standards

S/W

Software

 

Institute

 

 

ETU

ETSI Termination Unit

SD

Transmit Data

EXT

External

ST

Send Timing

H/W

Hardware

SYNC

Synchronization

HDSL

High-bit-rate Digital Subscriber Line

TM

Test Mode

Hz

Hertz

TT

Terminal Timing

I/F

Interface

UAS

Unavailable Seconds

ID

Identification

UTU

Universal Termination Unit

INT

Internal

V

Volts

kbps

kilobytes per second

Vdc

Volts direct current

km

kilometers

VT100

A terminal-emulation system

LED

Light Emitting Diode

W

Watts

70

August 9, 2002

UTU-701 and ETU-751 List 1