Appendix A
Test Results Definitions
DS1 results
142
CT-650 Command-Line Reference Guide
Release 9.4
One’s Den-
sity Alarm
A signal was detected containing less than
n
ones in
8(
n
+1) bits, where
n
= 1…23. The PRBS and LUP pat-
terns cause ones density alarms.
Excess
Zeros Alarm
A T1 signal was detected with 16 or more consecutive
zeros with AMI coding, or with 8 or more zeros with
B8ZS coding.
B8ZS
Detected
Flag indicating the type of line coding. If
Yes
, the
CT-650 detected B8ZS coding; if
No
, the CT-650
detected AMI coding.
Signal Loss
Hist
At least one loss of signal was detected but no longer
exists.
Frame Loss
Hist
At least one loss of frame synchronization was
detected but no longer exists.
Yellow
Alarm Hist
At least one yellow alarm was detected but no longer
exists.
Pattern
Loss Hist
At least one loss of pattern synchronization was
detected but no longer exists.
AIS Hist
At least one Alarm Indication Signal was detected but
no longer exists.
One’s Den-
sity Hist
At least one ones-density alarm was detected but no
longer exists.
Ones density signal was detected and later lost since
the last test restart.
Excess
Zeros Hist
At least one excess zeros alarm was detected but no
longer exists.
Field
Description
Summary of Contents for CT-650
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