User's Manual

Maintenance, Troubleshooting, and Technical Assistance PRELIMINARY
10-12 InterReach Unison User Guide and Reference Manual
PN 8700-10
620003-0 Rev. A
Expansion Hub Warnings
Remote Access Unit Warnings
Table 10-5 Expansion Hub Warnings
Warning Message Action Impact
Downlink fiber optical
loss greater than recom-
mended maximum
Check the downlink fiber cable for excessive
optical loss.
Clean the cable connector.
Clean the fiber ports.
Degraded system performance.
Uplink laser is failing Replace the Expansion Hub when possible. The uplink laser will eventually fail resulting in
the Expansion Hub and connected RAUs being
off-line.
Temperature is high Check room environmental controls. Potential Expansion Hub failure.
Fann failure Check the Expansion Hub fans for rotation,
air flow blockage, dust; replace the Expan-
sion Hub if temperature rises.
Temperature may rise to fault level resulting in
the Expansion Hub and connected RAUs being
off-line.
Cat-5/6 cable between
RAUn and Expansion
Hub is longer than rec-
ommended maximum
Check that the Cat-5/6 cable does not exceed
the recommended maximum length.
Degraded system performance.
Table 10-6 Remote Access Unit Warnings
Warning Message Action Impact
Temperature is high Move the RAU to cooler environment. Potential RAU failure.
DC voltage is low Check the Cat-5/6 cable for shorts and opens.
Replace the RAU when possible.
Unreliable operation.
Power amplifier is fail-
ing
Replace the RAU when possible. Potential RAU failure.
Cat-5/6 cable between
Expansion Hub and
RAU is longer than rec-
ommended maximum
Check that the Cat-5/6 cable does not exceed
the recommended maximum length.
Degraded system performance.
Antenna disconnected Check the RAU SMA antenna connection. Poor RAU coverage.