Lucent Technologies DDM-2000 OC-3 - Page 610

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Technical Specifications
10-22 Issue 3 June 2001
Intraoffice(IS-3)OC-3RateInterface(22D-U
OLIUs) 10
■ Optical Specification
The 22D-U OLIUs are short-reach optical interfaces used to interconnect
between the DDM-2000 OC-3 and OC-12 Multiplexers. The nominal line
rate is 155.520 Mb/s. The LED transmitter supplies an NRZ-coded signal.
Table 10-5, Table 10-6, and Table 10-9 provide detailed specifications and
link budget information for the 22D-U OLIUs.
■ Alarm Thresholding
The following parameters are monitored at the OC-3 interface.
— Loss of signal (LOS)
— Loss of frame (LOF)
— Loss of pointer (LOP)
—LineAIS
— B2 thresholding signal fail
— B2 thresholding signal degrade. (B2 signal degrade thresholds are
user settable in the range from 10
-5
to 10
-9
BER.)
■ Performance Monitoring (see Table 10-23)
— Section SEFS
— B2 parameters.
— STS pointer justifications (Release 11.0 and later)
22-type only.