Troubleshooting
9-18
InterReach Unison Installation, Operation, and Reference Manual
CONFIDENTIAL
D-620003-0-20 Rev J
{MW21}Hardware failure (UL Path)
Re-run system test. If warning persists, move EH to another port and re-run
system test. If warning persists, replace the MH when possible.
{MW22}Hardware failure (DL Pilot too
low)
Cycle power once. If warning persists, replace the MH when possible.
{MW25}Port 1 UL RF path has excessive
gain
If the warning is common to more than one port, replace the MH when possi-
ble. If only one port has the warning, try another MH port. If no warning is
reported, flag the previous port as unusable and replace the MH when possible.
Otherwise, replace the EH when possible.
{MW26}Port 2 UL RF path has excessive
gain
If the warning is common to more than one port, replace the MH when possi-
ble. If only one port has the warning, try another MH port. If no warning is
reported, flag the previous port as unusable and replace the MH when possible.
Otherwise, replace the EH when possible.
{MW27}Port 3 UL RF path has excessive
gain
If the warning is common to more than one port, replace the MH when possi-
ble. If only one port has the warning, try another MH port. If no warning is
reported, flag the previous port as unusable and replace the MH when possible.
Otherwise, replace the EH when possible.
{MW28}Port 4 UL RF path has excessive
gain
If the warning is common to more than one port, replace the MH when possi-
ble. If only one port has the warning, try another MH port. If no warning is
reported, flag the previous port as unusable and replace the MH when possible.
Otherwise, replace the EH when possible.
{MW29}Port 1 UL RF path is too high
Uplink RF loss is above the recommended minimum. If codes MS13-MS16 is
also present, the fiber is the most likely problem. Clean the fiber ports and con-
nectors. Ensure that the fiber connector is correctly seated.
If codes MS13-MS16 are not present, disconnect both downlink and uplink
fiber at the Main Hub. Wait 10 seconds, then re-connect downlink and uplink
fiber.
If the warning is common to more than one port, replace the MH when possi-
ble. If only one port has the warning, try another MH port. If no warning is
reported, flag the previous port as unusable and replace the MH when possible.
Clean the optical connectors and ports. If the warning persists, replace the EH
when possible.
{MW30}Port 2 UL RF path is too high
Uplink RF loss is above the recommended minimum. If codes MS13-MS16 is
also present, the fiber is the most likely problem. Clean the fiber ports and con-
nectors. Ensure that the fiber connector is correctly seated.
If codes MS13-MS16 are not present, disconnect both downlink and uplink
fiber at the Main Hub. Wait 10 seconds, then re-connect downlink and uplink
fiber.
If the warning is common to more than one port, replace the MH when possi-
ble. If only one port has the warning, try another MH port. If no warning is
reported, flag the previous port as unusable and replace the MH when possible.
Clean the optical connectors and ports. If the warning persists, replace the EH
when possible.
Table 9-4
Warnings Reported by the Main Hub (continued)
