Table of Contents
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150-451-142-04, Revision 04
Bit Error Rate
BER
BIT Error Rate Threshold
BERT
Bipolar Violation
BPV
Bi-polar Violation Transparency
BPVT
Customer Interface
CI
Central Office
CO
Customer Local Loopback
CLOC
Customer Premises Equipment
CPE
Cyclic Redundancy Check
CRC
Carrier Service Area
CSA
Channel Service Unit
CSU
Decibel
dB
Data Circuit-Terminating Equipment
DCE
Disable
DIS
Data Link
DL
Data Link Control
DLC
Digital Service, Level 1
DS1
Digital System Cross-Connect frame
DSX-1
Enable
EN
Errored Seconds
ES
Extended Super Frame
ESF
Extended Super Frame Data Link
ESF DL
Frame
FRN
High Capacity Digital Service
HCDS
High-bit-rate Digital Subscriber Line
HDSL
HDU-451 List 4B
October 8, 1998
Abbreviations
33
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