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Appendix
B-
Abbreviations
HRU-419 List 1
September 25, 1998
51
A
PPENDIX
B- A
BBREVIATIONS
2B1Q
2–Bits–1–Quaternary
AIS
Alarm Indication Signal
AMI
Alternate Mark Inversion
B8ZS
Bipolar 8-Zero Substitution
BPV
Bipolar Violation
CI
Customer Interface
CPE
Customer Premises Equipment
CRC
Cyclic Redundancy Check
CSA
Carrier Service Area
CSU
Channel Service Unit
DCE
Data Circuit-Terminating Equipment
HDSL
High-bit-rate Digital Subscriber Line
HDU
HiGain Doubler Unit
HLU
HiGain Line Unit
HRU
HiGain Remote Unit
I-CPE
Interface-Customer Premises Equipment
LOS
Loss of Signal
LOSW
Loss of Sync Word
NEBS
Network Equipment Building System
NI
Network Interface