363-206-285
Circuit Pack Descriptions
7-80 Issue 3 June 2001
Fault Detection Circuitry 7
The STS1E circuit pack has in-service and out-of-service built-in test capability.
In-service testing is continuous and errors are reported when they occur to the
SYSCTL via the intra-shelf control bus. An out-of-service test is performed
whenever the STS1E circuit pack is inserted or recovers from a transient failure.
Loopbacks 7
One loopback is provided on the STS1E circuit pack. This terminal loopback loops
the EC-1 output signal transmitted towards the STSX-1 back into the STSX-1
transport overhead processor input.
Performance Monitoring 7
The STS1E provides PM circuitry for the following performance parameters:
â– Line parameters derived from B2 coding violations
â– STS-1 parameters derived from B3 coding violations.
Power Circuitry 7
The STS1E receives two sources of −48 volts that are diode ORed, fused, and
filtered before being converted to +5 volts to power the circuit pack and +5.3 volts
to power the DS1/DS1PM circuit packs in the low-speed slots.
!
CAUTION:
For power reliability, when a muldem is equipped with DS1PM circuit packs,
the associated function unit must be equipped with two MXRVO/STS1E
circuit packs.
To Next Page
Loading...
Need help?
General
