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Circuit Pack Descriptions
7-50 Issue 1 December 1997
BCP3 Quick Reference Summary 7
Interface Functions 7
STS-1 signal interface functions performed by the BCP3 are as follows:
■ Transmission of selected STS-1 signals from function units to the main-b
circuit packs
■ Transmission of selected STS-1 signals from main-b to the function unit
circuit packs.
Timing signal interface functions are as follows:
■ Clock and frame selection from active and standby TGS circuit packs
■ Clock and frame distribution to main-b circuit packs
■ Clock and frame distribution to function units
■ Clock and frame distribution to companion BCP3 circuit pack.
Control Functions 7
■ Protection switching for all protected circuit packs
■ Inventory information (
CLEI
code, date of manufacture, etc.)
■ STS-1 and STS-3c path protection switching.
Maintenance Functions 7
Maintenance functions provided by the BCP3 circuit pack are as follows:
■ Circuit pack fault detection and reporting
■ STS path BIP-8 performance monitoring
■ Insertion of STS path AIS
■ Insertion and detection of path unequipped signal
■ Detection of STS-1 and STS-3c path fail BER (10
-3
)
■ Detection of STS-1 and STS-3c path BER signal degrade (10
-5
to 10
-9
).
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