Circuit Pack Descriptions
7-40 Issue 8.0 July 2002
Performance Monitoring. 7The DS3 circuit pack provides performance-monitoring
circuitry for the following performance-monitoring parameters:
■ DS3 line errored seconds
■ DS3 path coding violations
■ DS3 path errored seconds
■ DS3 path severely errored seconds
■ DS3 path severely errored frame/AIS seconds
■ DS3 path unavailable seconds
■ STS-1 path coding violations
■ STS-1 path errored seconds
■ STS-1 path severely errored seconds
■ STS-1 path unavailable seconds
■ Far-end STS-1 path coding violations
■ Far-end STS-1 path errored seconds
■ Far-end STS-1 path severely errored seconds
■ Far-end STS-1 path unavailable seconds.
The DS3 line errored seconds parameter is measured on DS3 signals from the
DSX-3 cross-connect panel, and all other performance-monitoring parameters are
measured on the 155.52 Mb/s signals from the OC48 RCVR circuit pack.
The DS3 line errored seconds count is based only on B3ZS coding violations and
bipolar violations.
In releases prior to 5, the DS3 path coding violations, errored seconds, severely
errored seconds, severely errored frame/AIS seconds, and unavailable seconds
counts are based on P-bit errors. In Release 5 and later releases, the FT-2000
OC-48 Add/Drop-Rings Terminal may be provisioned to accumulate DS3 path
performance-monitoring data based on P-bit errors or F and M framing bit errors.
The raw F and M framing bit error counts are adjusted to approximate the actual
error count in the DS3 path payload.
When an incoming line AIS, high speed defect, or internal fault is detected, the
DS3 circuit pack inserts a remote defect indicator-path (RDI-P) signal in the
155.52 Mb/s signal transmitted toward the OC48 TRMTR circuit pack.
The DS3 circuit pack also inserts and detects STS-1 path trace and path signal
label signals.
To Next Page
Loading...