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Page 96 / 112 Scroll up to view Page 91 - 95
T
ROUBLESHOOTING
A-2
LED Indicators
Link LED is Off
•
Verify that the Barricade and attached device are
powered on.
•
Be sure the cable is plugged into both the
Barricade and the corresponding device.
•
Verify that the proper cable type is used and that
its length does not exceed the specified limits.
•
Be sure that the network interface on the
attached device is configured for the proper
communication speed and duplex mode.
•
Check the adapter on the attached device and
cable connections for possible defects. Replace
any defective adapter or cable if necessary.
Network Connection Problems
Cannot Ping the
Barricade from the
attached LAN, or the
Barricade cannot Ping
any device on the
attached LAN
•
Verify that the IP addresses are properly
configured. For most applications, you should
use the Barricade’s DHCP function to
dynamically assign IP addresses to any host on
the attached LAN. However, if you manually
configure any IP addresses on the LAN, verify
that the same network address (network
component of the IP address) and subnet mask
are used for both the Barricade and any attached
LAN devices.
•
Be sure the device you want to Ping (or from
which you are Pinging) has been configured for
TCP/IP.
Troubleshooting Chart
Symptom
Action
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T
ROUBLESHOOTING
A-3
Management Problems
Cannot connect using
the Web browser
•
Be sure to have configured the Barricade with a
valid IP address, subnet mask and default
gateway.
•
Check that you have a valid network connection
to the Barricade and that the port you are using
has not been disabled.
•
Check the network cabling between the
management station and the Barricade.
Forgot or lost the
password
•
Press the Reset button on the front panel
(holding it down for at least five seconds) to
restore the factory defaults.
Printer Server
The printer cannot
print or prints garbage
•
Make sure the parallel cable between the
Barricade and printer is connected and is in good
condition
Troubleshooting Chart
Symptom
Action
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T
ROUBLESHOOTING
A-4
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Page 99 / 112
B-1
A
PPENDIX
B
C
ABLES
Ethernet Cable
Specifications
Twisted-pair Cable
Caution:
DO-NOT plug a phone jack connector into any RJ-45
port. Use only twisted-pair cables with RJ-45 connectors
that conform with FCC standards.
For 10BASE-T/100BASE-TX connections, a twisted-pair cable
must have two pairs of wires. Each wire pair is identified by two
different colors. For example, one wire might be red and the other,
red with white stripes. Also, an RJ-45 connector must be attached
to both ends of the cable. All RJ-45 ports, except for the WAN port,
support automatic MDI/MDI-X configuration. This means that you
can use straight-through cable to attach the LAN ports to any
network device. However, when connecting the WAN port to a
broadband modem, you will need to use either straight-through or
crossover cable, depending on the port type used on the modem.
Cable Types and Specifications
Cable
Type
Max. Length
Connector
10BASE-T
Cat. 3, 4, 5 100-ohm UTP
100 m (328 ft)
RJ-45
100BASE-TX
Cat. 5 100-ohm UTP
100 m (328 ft)
RJ-45
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C
ABLES
B-2
Figure B-1 illustrates how the pins on the RJ-45 connector are
numbered. Be sure to hold the connectors in the same orientation
when attaching the wires to the pins.
Figure B-1.
RJ-45 Connector Pin Numbers
Straight-through Cable
Crossover Cable
Straight-Through RJ-45 Pin Assignments
End 1
End 2
1 (TD+)
1 (TD+)
2 (TD-)
2 (TD-)
3 (RD+)
3 (RD+)
6 (RD-)
6 (RD-)
Pins 4, 5, 7 and 8 are not connected.
Crossover RJ-45 Pin Assignments
End 1
End 2
1 (TD+)
3 (RD+)
2 (TD-)
6 (RD-)
3 (RD+)
1 (TD+)
6 (RD-)
2 (TD-)
Pins 4, 5, 7 and 8 are not connected.
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