Screen Abbreviations; Table 11. Screen Abbreviations - ADTRAN HDSL DDM+ HTU-C Installation And Maintenance Practice

HDSL DDM+ Transceiver Unit for Central Office Installation and Maintenance Practice

Screen Abbreviations

Table 11 lists the abbreviations used in the screen examples shown in
Abbreviation
ES
SES
UAS
SF
ESF
B8ZS
AMI
LBO
BPV
NIU
S/N
15M
24H
18

Table 11. Screen Abbreviations

Definition
Errored Seconds
• DSX/DS1
– SF: Second in which a BPV or frame bit error occurs
– ESF: Second in which a BPV or CRC error occurs
• HDSL
– Second in which a CRC error occurs
Severely Errored Seconds.
• DSX/DS1
– SF: Second in which 1544 BPVs or 8 frame bit errors occurs
– ESF: Second in which 1544 BPVs or 320 CRC errors occur
• HDSL
– Second in which 165 CRC errors occurs
Unavailable Seconds
• DSX/DS1
– Second in which there is a loss of signal or sync
• HDSL
– Second in which there is a loss of signal or sync
Superframe Format
Extended Superframe Format
Binary 8 Zero Substitution
Alternate Mark Inversion
Line Build Out
Bipolar Violation
• DSX/DS1
– Second in which a bipolar violation occurs
T1 Network Interface Unit
Serial number
Fifteen-Minute Period
Twenty-Four-Hour Period
Figures 7 through 23.
61247003L6-5A