Zhone 891630, Справочное руководство системы

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Reference Guide IMACS System Release 5.1.9 7-29
WAN Card WAN Card User Screens and Settings
ES
An Errored Second (ES) is a second with one or more CRC-6 (ESF) or BPV (D4/D-Frame)
errors, one or more OOFs, or one or more Controlled Slips.
UAS
An Unavailable Second (UAS) is any second during which service is unavailable. An
unavailable signal state is declared after ten consecutive Severely Errored Seconds (SESs) are
logged. An unavailable state is cleared after ten consecutive non-Severely Errored Seconds
are logged. Unavailable Seconds are also accumulated if the card has an out-of-service (OOS)
condition.
SES
A Severely Errored Second (SES) is any second with 320 or more CRC-6 (ESF) or BPV
(D4/D-Frame) errors, or one or more OOF errors.
BES
A Bursty Errored Second (BES) is any second with more than one and fewer than 320 CRC-6
(ESF) or BPV (D4/D-Frame) errors.
LOFC
The Loss of Frame Count (LOFC) is the accumulation of the number of times a Loss Of Frame
(LOF) is declared. An LOF is declared after 2.5 seconds of continuous Loss Of
Synchronization (LOS) or OOF condition. An LOF is cleared after no more than fifteen
consecutive seconds without an LOS or OOF condition.
SLIP
A Slipped Second is any second containing one or more Controlled Slips. A Controlled Slip
is the deletion or replication of a DS1 frame by the receiving equipment.
PgDn Pages through the performance statistics for the current 15-minute period
and periods 1-96.
Main Returns to the WAN Card Main Screen.