Before Running The Tests; Types Of Tests - 3Com 10/100BASE-T4 User Manual

4-2 C
HAPTER

Before Running the Tests

When the DOS operating system first loads, it executes the
AUTOEXEC.BAT and CONFIG.SYS files. These files are user-
definable files that set up the computer environment and
may also load memory managers and drivers into memory.
If you are using DOS 6.x in a plain DOS environment, you can
bypass the CONFIG.SYS and AUTOEXEC.BAT files by holding
down the right shift key while starting the computer. If you
are running under DOS 6.2, pressing [F5] while starting the
computer will also bypass the same two files.
After performing the diagnostic tests, reboot your computer.

Types of Tests

The diagnostic tests are divided into three groups, of which
only the Group 1 and Group 3 tests apply to the
Fast EtherLink 10/100BASE-T4 PCI adapter.
The Group 1 test checks the physical components and
circuitry on the adapter. These tests are run as default tests.
The Group 2 test (Network Loopback Test) is not used on
twisted-pair adapters such as the Fast EtherLink 10/100BASE-T4
PCI adapter.
The Group 3 test (the Echo Exchange Test) tests the adapter's
ability to transmit and receive data while on the network.
CAUTION: Running the Group 3 test while connected to an
active network can cause intermittent failures. To avoid this,
connect to an inactive network on which only the computer
being tested is operating.
If you run the diagnostic tests successfully, you rule out a
hardware failure on the computer. If the adapter passes all
the tests and there still appears to be a problem, look at
cabling, software, and other issues that affect functionality on
the network.
4: P T
ERFORMING ROUBLESHOOTING AND
D T
IAGNOSTIC ESTS