Transcend Information III manual Running the Group 2 Test, Assembling a Loopback Plug

Starting the Diagnostic Program 5-5

Running the Group 2 Test

The Group 2 test is called the Network Loopback Test. It tests the 3C592-COMBO adapter’s ability to transmit and receive data via the internal transceiver. This test requires installation of a loopback plug at the adapter’s BNC transceiver connection. Or, you can run the test on a nonproduction network on which only the computer being tested is operating.

CAUTION: Running the Group 2 test while connected to an active network can cause intermittent failures.

Assembling a Loopback Plug

If you do not have a loopback plug, you may be able to get one from your authorized network supplier, or you can make your own. To assemble the loopback plug, connect two 50-ohm network cable terminators to a T connector, as shown in Figure 5-2. You can purchase the terminators from your network supplier (3Com part number 3C535).

T connector Terminator

Terminator

Figure 5-2 Assembling a Loopback Plug

Starting the Group 2 Test

To run the Group 2 test on a 3C592 EISA adapter, follow these steps:

1Connect the loopback plug to the round BNC connector on the back of the adapter.

2Start the Configuration and Diagnostic Program, as described earlier in this chapter.