HP 24S Uživatelská příručka stáhnout pdf (Strana 50)

Diagnostic Tests

Testing the Hub Only

Choose one of the following procedures to test the hub’s internal circuitry. The first is the

most complete internal test. (The hub’s ports are not tested with the following procedures;

see the next page to test the ports.)

Cycle power on the hub by unplugging the power cord and then plugging it in.

This causes the hub to test itself. All LEDs should go ON momentarily before

returning to their operational states. If all do not go ON, an LED may be burned

out, or the hub is faulty. If the Fault LED on the front or back of the hub stays

ON, the hub is faulty and must be replaced.

Connect a console to the hub. Use the console’s Reset command, which causes the

hub to test itself. All LEDs should go ON momentarily before returning to their

operational states. If all do not go ON, an LED may be burned out, or the hub is

faulty. If the Fault LED on the front or back of the hub stays ON, the hub is

faulty and must be replaced. See chapter 3, “Operation”, for console command

details.

For the HP 28688B and HP 28699A only, use an HP network management

product to run a self-test. For instructions, see the network management

documentation.

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HP 24S Uživatelská příručka Strana 50