LTPH-UG-1166-01
Appendix E - Abbreviations
HMS-317 and HMS-318
July 15, 2002
29
A
PPENDIX
E - A
BBREVIATIONS
CI
Customer Interface
CLEI
Common Language Equipment Interface
CO
Central Office
CREM
Customer Remote Loopback
DDS
Digital Data Service
DSX-1
DS-1 Cross-connect frame
ECI
Equipment Catalog Item
HDSL
High-bit-rate Digital Subscriber Line
HDU
HiGain Doubler Unit
HLU
HiGain Line Unit
HMS
HiGain Management Shelf
HMU
HiGain Management Unit
HRE
HiGain Remote Enclosure
HRU
HiGain Remote Unit
LED
Light Emitting Diode
NLOC
Network Local Loopback
NVRAM
Non-volatile Random Access Memory
PIC
Plastic Insulated Conductor
RCV
Receive
RMA
Return Material Authorization
STS
Synchronous Transport System
XMT
Transmit
ZBTS
Zero Byte Timeslot