Appendix A
Test Results Definitions
DS3 results
CT-650 Command-Line Reference Guide
Release 9.4
131
Parity
The following fields appear in the Parity category of the DS3 test
results screens.
Field
Description
Par Errors
Number of parity errors detected since initial DS3
frame synchronization.
Average Par
Err Rate
Ratio of parity errors to (1) the number of bits over
which parity was calculated (Bit mode), or (2) the num-
ber of DS3 M-frames received (Block mode). The error
rate is computed while DS3 frame synchronization is
present. To verify that the CT-650 is using bit mode or
block mode, use the command
Information Con-
figure Defaults DS3
.
Par % EFS
Ratio of error-free seconds, expressed as a percent-
age, during which no parity errors were detected to the
total number of seconds while DS3 frame synchroni-
zation is present.
FEBE RATE
Ratio of FEBEs to (1) the number of bits over which
C-bit parity was calculated (Bit mode), or (2) the num-
ber of DS3 C-bit M-frames received (Block mode). The
error rate is computed over the previous block of 10
8
bits. To verify the CT-650 is using bit mode or block
mode, use the command
Information Configure
Defaults DS3
.
FEBE % EFS
Ratio of error-free seconds, expressed as a percent-
age, during which no far-end block errors were
detected to the total number of seconds during which
DS3 C-bit frame synchronization is present.
FEBE Sec
Type B
Number of seconds during which 2 to 44 FEBEs
occurred since initial DS3 C-bit frame synchronization.
Summary of Contents for CT-650
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