Installation Guide (J3192C, and J3193B) 1998-07

Troubleshooting

The fiber-optic cable connector doesn’t fit in the 100Base-FX

transceiver. The fiber-optic transceiver has SC connectors. You may be

trying to connect a cable with ST connectors. SC-to-ST adapters are avail-

able. Contact your HP-authorized LAN dealer.

The port LED for the 100Base-T transceiver is not on. The connected

module or device must be a 100Base-T device that is powered on.

A connected device is not transmitting the signal. Verify that the cable

length does not exceed 100 meters for a twisted-pair connection or the

distances listed above for a fiber-optic connection. Verify that the connected

device is on and check all cabling and connections (including patch panels).

If the port for the transceiver can be configured to either 10 Mbit/s or 100

Mbit/s and/or full- or half-duplex, ensure that the ports at both ends of the

connection are configured alike. Try a different cable.

The Fault LED is flashing. Verify that you have a 100Base-TX or FX

transceiver in a 100Base-T transceiver slot. Placing a 100Base-TX or FX

transceiver into a 100VG slot may cause the Fault LED to flash. Refer to the

documentation you received with the networking device for information on

transceiver installation. Turn off the power and reinsert the transceiver into

the module and verify the screws are tightened.

Link from a J3192A 100Base-TX transceiver to another device not

recognized or failing. The J3192A version of the transceiver should be

installed only in the “A” version of a Switch 2000 (HP J3100A). For other HP

devices (such as the Switch 2000B, Switch 208T, Switch 224T, and the Switch

800T) using J3192 series 100Base-TX transceivers, install the “B” or “C”

version of the transceiver (J3192B or J3192C).

For most of these problems, you can also use the device’s console interface

(for example with a VT-100 console device), or HP AdvanceStack Assistant

to troubleshoot and configure the 100Base-T transceiver port. See the

HP networking device’s manual (such as the HP AdvanceStack Switch 2000

manual) for more information.

If a J3192 twisted-pair transceiver link is failing, ensure that the correct

cable type is in use: straight-through for an MDI-X to MDI link, or crossover

for an MDI-X to MDI-X link.

If you are still having trouble, see “Support is as close as the World Wide

Web!” on page 20.

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