Lucent Technologies FiberReach DDM-2000 - Page 487

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Technical Specifications
Issue 3 June 2000
10-13
Intra-office (IS-3) OC-3 Rate Interface
(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 10-4, Table 10-5, and Table 10-8 provide detailed specifications and
link budget information for the 22D-U OLIUs.
■
Alarm Thresholding
The following parameters are monitored at the OC-3 interface:
—LOS
—LOF
—LOP
— Line AIS
— 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.)
■
Line PM (See Table 10-3 and Table 10-23.)
— Section SEFS
— B2 parameters
— STS-1 Path PM. (See Table 10-3 and Table 10-23.)