
Monitoring ATM Using the BCC show Command
117374-C Rev 00
B-13
Pbit Status
Circuit Name of the circuit associated with this line.
Interval The current interval.
PESs The number of P-bit errored seconds (PESs) in the current interval.
A PES is a second with one or more P-bit coding violations,
one or more OOF defects, or a detected incoming AIS. The PES
does not increment when counting UASs.
PSESs The number of P-bit severely errored seconds (PSESs) in the
current interval. A PSES is a second with 44 or more PCVs, one or
more OOF defects, or a detected incoming AIS. The PSES value
does not increment when counting UASs.
UASs The number of unavailable seconds (UASs) in the current interval.
PCVs The number of P-bit coding violations (PCVs) in the current interval.
For all DS3/E3 applications, a coding violation error event is a P-bit
Parity Error event. A P-bit Parity Error event occurs when the DS-3/
E-3 M-frame receives a P-bit code that is not identical to the
corresponding locally calculated code.
Cbit Stats
Circuit Name of the circuit associated with this line.
Interval The current interval.
CESs The number of C-bit errored seconds (CESs) in the current interval.
A CES is a second with one or more CCVs, one or more OOF
defects, or a detected incoming AIS. This count is only for the
C-bit Parity DS3 applications. The CES value does not increment
when counting UASs.
CSESs The number of C-bit severely errored seconds (CSESs) in the
current interval. A CSES is a second with 44 or more CCVs, one or
more OOF defects, or a detected incoming AIS. This count applies
only to C-bit Parity DS3 applications. The CSES value does not
increment when counting UASs.
UASs The number of unavailable seconds (UASs) in the current interval.
CCVs The number of C-bit coding violations (CCVs) in the current interval.
For C-bit Parity and SYNTRAN DS3 applications, this is the count of
coding violations reported via the C-bits. For C-bit Parity, it is a
count of C-bit parity errors occurring in the accumulation interval.
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