PictureTel III ISA manual Running the Group 2 Test, Follow these steps to run the Group 1 tests

Diagnostic Testing Under Windows 3.x 6-3

Follow these steps to run the Group 1 tests:

1From the Test menu, select Run Tests and press Enter. The Run Tests dialog box appears with the Start button already selected.

2Press Enter to start the tests.

Group 1 tests run 10 times (default setting) unless you specify otherwise. The test results are displayed in the Results column.

Running the Group 2 Test

The Group 2 test is the Network Loopback Test. It tests whether the 3C509B-COMBO and 3C509B-TPC NICs can transmit and receive data over thin Ethernet coaxial wire. This test requires either installing a loopback plug at the transceiver connection on the NIC or running the test on an idle network.

A failure in this test usually indicates a cabling problem.

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 can order one from your authorized network supplier or you can make your own. You can purchase the terminators from your network supplier (3Com part number 3C535).

To assemble the loopback plug, connect two 50-ohm network cable terminators to a T connector, as shown in Figure 6-1.

T connector

50Ω Terminator

50Ω Terminator

Figure 6-1Assembling a Loopback Plug