10
Troubleshooting
LED Symptom
Action
All LEDs remain on. The RTU is not functional. If the LEDs remain on after five
minutes, contact the NSP.
ALM LED remains
on.
The power-on self-test may have failed. Unplug the unit and
reapply power. If the alarm LED is still on, contact the NSP.
ALM and TST
LEDs are on.
Firmware download may be in progress. If the LEDs remain on
after five minutes, contact the NSP.
DSL LED is off.
Verify that the DSL cable is securely installed on both ends. If
the problem continues, contact the NSP.
DSL LED continues
to blink after the
power-on self-test.
The RTU is attempting to establish the DSL link. If the DSL
LED continues to blink for more than five minutes, contact the
NSP.
DSL LED is on and
there is no data
transmission.
The DSL link has been established but there is no data
transmission. First, verify the Ethernet connection. If the
problem persists, contact the NSP.
DSL and Ethernet
LEDs are on and
there is no data
transmission.
The DSL and Ethernet links have been established but there is
no data transmission. If the problem continues, contact the
NSP.
Ethernet LED is off.
Verify that the Ethernet 10BaseT cable is securely installed at
both ends, and at least one PC is connected and powered on.
Verify that the correct straight-through or crossover cable is
installed. Refer to
Installing the Hotwire 5620 RTU
,
page 6.
PWR LED is off.
Check that the power cord is securely installed on both ends.
If no LEDs are on, the power supply may be defective. Test the
outlet to verify power. If the problem persists, contact the NSP.
If other LEDs are on, the PWR LED may be burned out. Unplug
the unit and reapply power; watch all LEDs during the
power-on self-test to verify if the PWR LED is functioning.
TST LED is on.
A test initiated by the NSP may be active. Wait five minutes.
If the TST LED does not go off, contact the NSP.
Increasing the Number of End-User Systems
A single PC is attached to the Hotwire 5620 RTU using an Ethernet crossover cable. To
increase the number of PCs, connect all PCs to an Ethernet hub using a
straight-through cable.
The 5620 RTU can support up to 32 PCs. Verify any planned changes with the NSP.
