Administration and Provisioning
Issue 8.0 July 2002
8-117
accepts the path AIS as a good signal, and no trouble condition is
reported.
— The Alarm Level parameter sets the severity of an incoming (from
the lightguide cross-connect panel) signal failure condition. The
choices are:
- "CR": critical
-"MJ":major
- "MN": minor
- "NA": status not alarmed
- "NR": status not alarmed and not reported to the OS.
- "NO": no failure conditions reported.
(Not applicable to slots in the 1+1 Protection Mode.)
— The Signal Degrade Threshold is the base 10 logarithm of the OC-3
line parity (B2) error rate threshold. The allowed values are "-5,"
"-6," "-7," "-8," or "-9". A signal degrade condition is reported for
OC-3 signals received from the lightguide cross-connect panel with
error rates greater than the threshold.
— The Output AU4 Mapping parameter sets the AU4 mapping bit to
SONET or SDH. The OC3 circuit pack can automatically support
transport of STS-3, STS-3c, or STM-1 signals carrying AU-4
mapped signals. For STM-1 AU-4 mapped payloads, the OC3 circuit
pack can be provisioned to output the appropriate values in the
pointer bytes so that direct interface to SDH equipment is possible
over an STM-1 optical interconnection. The high-speed transport of
the payload is SONET, but this does not present any operational
difficulties. "SONET" indicates the transport of an OC-3 signal.
"SDH" indicates the transport of an AU4 signal.
— The Timing Direction parameter determines which high speed line
(1W, 1E) the LAA10B circuit pack receives its timing from when the
network element’s synchronization mode is through-timed.
NOTE:
The OC3 timing direction of a 1+1 protected slot pair should be set to
the same OC-48 line to avoid potential downstream synchronization
problems.
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