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Abbreviations 700-701-100-02
70 August 9, 2002 UTU-701 and ETU-751 List 1
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
Institute
S/W Software
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