Zhone Technologies 900 - Manual (Page 62)

1-50 IMACS System Release 5.1.6 Data Cards
Model No. Running Head HSU Card User Screens and Settings HSU Card
Table 1-20. Performance Data Screen Actions
ES
An Errored Second (ES) is any second containing one or more frames of CRC-5 errors.
UAS
An Unavailable Second (UAS) is any second during which service is unavailable. An
unavailable signal state is declared after ten consecutive SESs (Severely Errored Seconds) are
logged. An unavailable state is cleared after ten consecutive non-Severely Errored Seconds
are logged.
SES
A Severely Errored Second (SES) is any second in which the BER exceeds 1x10
- 3 .
BES
A Bursty Errored Second (BES) is any second in which the BER is between zero and 1x10
- 3 .
LOFC
The Loss of Frame Count (LOFC) is the accumulation of the number of times an LOF (Loss
Of Frame) is declared. An LOF is declared after 2.5 seconds of a continuous LOS (Loss Of
Synchronization) or OOF (Out-Of-Frame) condition. The LOF is cleared after one second
without an LOS or OOF condition.
LOPS
A Loss of Packet Second (LOPS) is any second during which no remote data is received. This
is valid only for local statistics.
Action Function
Refresh Updates performance data fields that are not automatically updated in real
time. Use the Refresh command to display the latest data.
Local Shows the local register data.
remoTe Shows the remote register data.
pgUp Allows you to see the first 12-hour period (current + 1 to 12).
pgDn Allows you to see the second 12-hour period (current + 12 to 24).
Clearregs Clears the registers currently being viewed (remote or local).
Main Returns to the HSU Card Main Screen.