ADC and 3 Doubler Manuel D’Utilisation
Appendix E - Glossary
LTPH-UM-1234-01
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April 30, 2003
HDU-409 Lists 1, 2, and 3
A
PPENDIX
E - G
LOSSARY
2B1Q
Two-Binary, One-Quaternary. Line coding used for HDSL.
AIS
Alarm Indicator Signal
AWG
American Wire Gauge. The standard used to describe wire size. The diameter
of the wire increases as the gauge decreases. 26 gauge is 0.188 inches
(4 mm) in diameter, 24 gauge is 0.241 inches (51 mm), and so on.
of the wire increases as the gauge decreases. 26 gauge is 0.188 inches
(4 mm) in diameter, 24 gauge is 0.241 inches (51 mm), and so on.
BBS
Bulletin Board System
Bridged Tap
A pair of wires connected in parallel across a single line to form a “T”
configuration.
configuration.
Cable Binder
Group
Group
A group of 25 pairs of wires.
CAP
Capacitor
CDU
HDU to Customer loopback
CO
Central Office
COLU
Central Office Line Unit
COT
Central Office Terminal
CRC
Cyclic Redundancy Check
CSA
Carrier Serving Area/Customer Service Area
DDS
Digital Data Service
FIL
Filter
GFD
Ground Fault Detection
HCDS
High Capacity Digital Service
HDSL
High-bit-rate Digital Subscriber Line
HDU
HiGain Doubler Unit
HLU
HiGain Line Unit