Specifications

Chapter 4. Troubleshooting & Diagnostics FOMi-E1/T1 Installation & Operation Manual
4-2 Status Indicators and Alarms
Table 4-1 Troubleshooting
Symptom Possible Cause Corrective Action
PWR LED is off. Blown fuses Replace the fuses.
On a stand alone AC unit the fuse is on the
rear panel.
On a stand alone DC unit, the fuses are on
the PCB, close to the power input connector.
ERR and OPTICAL LOW LEDs
are on.
The line between the
modems is not connected
properly.
Check that the line is properly connected.
Check that the wave length settings of the
fiber optic interfaces on both sides match
each other and match the fiber optic cable
type.
Check that the jumpers on both modems are
set to the same baud rate.
ERR LED is on and NO
MANAGEMENT alarm is stored
in the alarm buffer.
The line between the
modems is not connected
properly.
Check that the line is properly connected.
Check that the remote modem is configured
to New mode of operation (LINE CONFIG
menu).
ERR LED is on and NO FIBER
INTERFACE alarm is stored in
the ALARM BUFFER.
No FIBER optic interface,
or a FIBER optic interface
which is not supported by
the modem.
Connect a FIBER optic interface which is
supported by the modem.
ERR LED is on and SELF TEST
FAILED alarm is stored in the
ALARM BUFFER.
Hardware failure Replace the unit.
ELECTRICAL LOW LED is on. The line between the
modem and the DTE is
not connected.
Check that the DTE and the attached
modem are set to the same baud rate.
Check that the cable connecting the DTE
and the modem is of the correct type and
that it is not defective.