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7.3.4 Cabling
1. Verify that the cable type is correct. Be sure RJ-45 cable connectors are
securely seated in the required ports. Use 100Ω straight-through cables
for all standard connections.
2. Use Category 5 cable for 100/1000Mbps Fast Ethernet connections, or
Category 3, 4 or 5 cables for standard 10Mbps Ethernet connections.
3. Be sure RJ-11 phone wiring uses 18~26 gauge.
4. Make sure all devices are connected to the network.
5. When cascading two devices using RJ-45 station ports at both ends of
the cable (i.e., not an MDI port), make sure a crossover cable is used.
Crossover cable should only be used if a MDI port is not available.
7.3.5 Physical Configuration
If problems occur after altering the network configuration, restore the original
connections, and try to track the problem down by implementing the new
changes, one step at a time. Ensure that cable distances and other physical
aspects of the installation do not exceed recommendations.
7.3.6 System Integrity
As a last resort verify the SP3508A integrity with a power-on reset. Turn the
power to the SP3508A off and then on several times. If the problem still
persists and you have completed all the preceding diagnoses, contact your
dealer for assistance.
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