BLACK BOX→ Power Over Ethernet Switch(PoE) Installation and User Guide
5.1Before Calling for Assistance
1.If difficulty is encountered when installing or operating the unit, refer back to the Installation Section of the applicable chapter of this manual. Also check to make sure that the various components of the network are interoperable.
2.Check the cables and connectors to ensure that they have been properly connected and the cables/wires have not been crimped or in some way impaired during installation. (About 90% of network downtime can be attributed to wiring and connector problems.)
3.Make sure that an AC power cord is properly attached to each
LP004A Series unit. Be certain that the AC power cord is plugged into a functioning electrical outlet. Use the PWR LEDs to verify each unit is receiving power.
4.If the problem is isolated to a network device other than the LP004A and LBH110 Series 10/100 Mb/s switch product, it is recommended that
the problem device is replaced with a known good device. Verify whether or
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