User's Manual

APCD–NC003–1.0 51
7 Troubleshooting
This section provides possible solutions for common problems associated with NCL1135
operation.
To verify that the connection has been re-established, test the connection using a ping test
described in
Performing a Ping Test , on page 33.
To verify the routing, follow the procedures in
Verifying NCL1135 Routing , on page 53.
Table 5 Common Problems and Solutions
Symptom Possible Cause Solution
Power LED on back panel
of NCL1135 is off
NCL1135 is not receiving power. • Ensure that the device is plugged into a 110 -
220 V AC outlet and that there is power at the
outlet.
• Check all cables for loose or faulty
connections. Replace cables if necessary.
Cannot communicate with
NCL1135 from the Ethernet
side and the Ethernet light is
off
NCL1135 is not receiving power. • Ensure that the device is plugged into a 110 -
220 V AC outlet and that there is power at the
outlet.
• Check all cables for loose or faulty
connections. Replace cables if necessary.
Ethernet cable is faulty or the wrong type
(crossover vs. straight-through).
• Replace Ethernet cable, if necessary.
Cannot communicate with
NCL1135 from the Ethernet
side and the Ethernet light is
on
NCL1135 configuration is incorrect. Connect a computer to the RS-232 port and log
into the NCL1135.
• Verify Ethernet IP address.
• Verify bridging or routing.
• Verify Routing Table, if applicable. See
Verifying NCL1135 Routing , on page 53.