Specifications

Installation and Operation Manual Chapter 4 Diagnostics and Troubleshooting
FOM-E3, FOM-T3 Ver. 1.0 Technical Support 4-3
4.3 Troubleshooting Instructions
In case a problem occurs, refer to Table 4-1 for the troubleshooting procedures.
Perform the actions listed under
Corrective Measures in the order given in the
table, until the problem is corrected.
Table 4-1. Troubleshooting Chart
Trouble Symptoms Probable Cause Corrective Measures
PWR indicator is OFF No AC power • Verify that the power outlet is providing the
required power.
• Ensure that the both ends of the power cable are
connected properly.
Blown fuse Replace with a fuse of correct rating
ELECTRICAL LOW
indicator is ON
One of the E3/T3 coaxial
cables is defective or
disconnected
Ensure that both ends of the E3/T3 coaxial cables are
connected correctly and that the cables function
properly.
Attached equipment
outputs do no comply
with G.703 electrical
levels
Check that the output levels of the equipment
attached to the E3/T3 interface comply with G.703.
JP5 is set incorrectly
Correct the JP5 settings according to Table 2-1 .
ELECTRICAL AIS
indicator is ON
Attached equipment
transmits "All 1s" string
Check the equipment attached to E3/T3 electrical
interface, ensure that it transmits real data.
Optical ERR indicator
is ON
No optical connection Ensure that both transmit and receive fiber cables are
properly connected to the local and remote units.
The optical budget is low Measure the optical loss over the fiber link and check
that it meets the product specifications.
OPTICAL AIS is ON The equipment attached
to the remote unit
transmits "All 1s" string
Check the equipment attached to the remote FOM-E3
or FOM-T3
TEST LOC indicator is
ON
The unit is in the local
loopback mode
Set the front panel TEST slide switch to NORM
position.
TEST REM indicator is
ON
The unit is in the remote
loopback mode
Set the front panel TEST slide switch to NORM
position.
4.4 Technical Support
Technical support for this product can be obtained from the local distributor from
whom it was purchased.
For further information, please contact the
RAD distributor nearest you or one of
RAD's offices worldwide.