350-431-116-01, Revision 01
Appendix C: Abbreviations
HLU-431 List 1F
January 8, 1999
23
A
PPENDIX
C: A
BBREVIATIONS
2B1Q
2 Binary, 1 Quartenary
HRE
HiGain Remote Enclosure
ACO
Alarm Cut-Off
HRU
HiGain Remote Unit
ALM
Alarm
HVI
High Voltage Interface
B8ZS
Bipolar with Eight Zero
Substitution
HVP
High Voltage Protection
BVP
Bipolar Violation
LED
Light Emitting Diode
CBA
Channel Bank Assembly
LLOS
Local Loss of Signal
CI
Customer Interface
LOS
Loss of Signal
CLEI
Common Language Equipment
Interface
LOSW
Loss of Sync Word
CO
Central Office
MAL
Margin Alarm
COM
Communications
MNGD
Managed
CPE
Customer Premises Equipment
NVRAM
Non-volatile Random Access
Memory
CRC
Cyclical Redundancy Check
RLOS
Remote Loss of Signal
DS0
Digital Signal Level 0
RCV
Receive
DSX-1
DS-1 Cross-connect frame
ZBTS
Zero Byte Timeslot
ECI
Equipment Catalog Item
ES
Errored Seconds
ESF
Extended Superframe
GNLB
Generic Loopback
GPR
Ground Potential Rise
HDSL
High-bit-rate Digital Subscriber
Line
HDU
HiGain Doubler Unit
HUE
HiGain Universal Enclosure
HLU
HiGain Line Unit
HMS
HiGain Management Shelf
HMU
HiGain Management Unit
Summary of Contents for HLU-431
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