Black Box LPH240A-H, Operation Manual

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Chapter 5: Troubleshooting
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5.1 Before 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. If the problem is isolated to a network device other than the
LPH240A Switch product, it is recommended that the problem
device is replaced with a known good device. Verify whether or not
the problem is corrected. If not, go to Step 4 below. If the problem is
corrected, the LPH240A Switch and its associated cables are
functioning properly.
4. If the problem continues after completing Step 3 above, contact your
supplier of the LBH08x/LBH18x Industrial Switch unit or if unknown,
contact Black Box Tech support (see page 4 of this guide) for
assistance.