Nokia MetroHopper, Руководство пользователя

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Commissioning and Maintenance
40 (42) © Nokia Networks Oy DN99611394
Issue 2-0 en
A.3 MetroHopper unit alarms
Loss of frame alignment
Severity: Critical Unit/SB type:
1) Flexbus
2) Platform interface
Fault code: 81 Consequence: 1) AIS is connected to all received Flexbus channels.
2) AIS is connected to the receiving direction of the platform interface.
Meaning: 1) IU has lost frame alignment
2) Platform interface has lost frame alignment.
Instructions: 1) -Check from the Configuration view that all installed units are present. A faulty OU may not be
displayed in Configuration view. Try connecting power feed off and back on. If the OU still is not present, replace
it.
- Check that the radios are configured correctly (i.e. no ‘configuration error’ or ‘fault in unit’ alarms).
-If RX level is good enough, check that both ends of the hop are set to same capacity and that Flexbus
interfaces are in use, and that the outdoor units’ interleaving settings are same at both ends of the hop. Check
with Flexbus loop to equipment whether the IU locks to its own signal. If not, replace the indoor unit.
2) -Check from the Cross-connection view that the right signal is connected to this interface at both ends of the
hop.
-Use platform interface loop to equipment to check that platform interface locks to its own TX signal. If not,
replace the unit.
-Use Flexbus loop to equipment and check that platform interface locks to its own signal. If not, replace the unit.
Cancelling:
Fault in power supply
Severity: Critical SB: Radio interface
Fault code: 0 Consequence:
Meaning: One (or more) of the supply voltages is low (difference between nominal and real voltage is bigger
than 10%).
Instructions: Replace the unit and return the faulty one to maintenance.
Cancelling: