Nokia MetroHopper, User Manual

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Alarm descriptions
DN99611394 © Nokia Networks Oy 41 (42)
Issue 2-0 en
Fault in unit
Severity: Critical SB: Radio interface
Fault code: 150 Consequence:
Meaning: Initialisation fault: data missing from EEPROM or the file system; EEPROM not readable due to
hardware fault or EEPROM not initialised properly.
Instructions:
Cancelling:
Incoming signal level incorrect
Severity: Critical SB: Radio interface
Fault code: 59 Consequence:
Meaning: Received signal level is below the limit (-75 dBm). Possible reasons: far-end transmitter off;
misalignment; hop distance too long; line-of-sight obstructed; heavy rain; antenna broken or extremely dirty.
Instructions: Check the alignment. Return a faulty unit to maintenance.
Cancelling:
Loss of incoming radio signal
Severity: Critical SB: Radio interface
Fault code: 60 Consequence:
Meaning: Frame alignment word lock lost. Signal level too low or no far-end radio present. Possible HW fault in
near-end radio.
Instructions: Check the far-end radio, alignment and/or the radio path. Return a faulty unit to maintenance.
Cancelling:
No free channel
Severity: Critical SB: Radio interface
Fault code: 40 Consequence: