Glossary

September 25, 2006

K

kbps – kilobytes per second km – kilometers

L

LED – Light Emitting Diode

LL– Local Loopback

LDC – Loss of Data Port (Nx64k) Clock

LEC – Loss of External Clock

LOC – Loss of Clock

LOSW – Loss of Sync Word

LPBK – Loopback

LTU – Line Termination Unit

M

M34F M-type 34-pin Female Connector

MAR – Margin

Mbps – Megabits per second

MHz – Megahertz

mm– millimeter

N

NC – Normally Closed

NO – Normally Open

NTU – Network Termination Unit

NVRAM Non-volatile Random Access Memory

Nx64k – Number (N) of 64 kbps DS0 time slots mapped to a data port.

O

Op – Operation

PFO – Power Feed Open

PFS – Power Feed Short ppm – pulse per minute

PRBS – Pseudorandom Bit Sequence

R

RAM – Random Access Memory

REM – Remote

RL – Remote Loopback

RLSD – Received Line Signal Detector

RTS – Ready to Send

S

SD – Transmit Data

SLIP – Serial Line Internet Protocol

ST – Send Timing

STU-C– SHDSL Terminating Unit for the CO

STU-R– SHDSL Terminating Unit for the RT

S/W – Software

GL-2

LTPE-UM-3159-02

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ADC EMU-830 user manual Glossary September 25, GL-2 LTPE-UM-3159-02