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Circuit Pack Descriptions
7-50 Issue 3 June 2001
■ HDSL Alarm History
■ LOSW, HDSL1 - Loss of Sync on Loop 1
■ LOSW, HDSL2 - Loss of Sync on Loop 2
■ ES, HDSL1 - Exceeded ES Threshold on Loop 1
■ ES, HDSL2 - Exceeded ES Threshold on Loop 2
■ Margin, HDSL1 - Exceeded Threshold on Loop 1
■ Margin, HDSL2 - Exceeded Threshold on Loop 2
Power Circuitry 7
The MXRVO circuit packs supply +5V power to the HDSL circuit packs in the
corresponding DS1PM circuit pack groups. These inputs are diode ORed and the
output is fused and then filtered before it is used to power the rest of the circuit
pack. A failure of the fuse or converter causes the red FAULT LED to light.
!
CAUTION:
For power reliability, when a muldem is equipped with HDSL circuit packs,
the associated function unit must be equipped with two MXRVO circuit
packs.
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