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– Remote communications - SDLC, ISDN, frame relay, and so on
– Local area networks - Ethernet, token-ring, wireless, LocalTalk, and so on
– Cryptographic resources
– Facsimile features
v Diagnose and verify communications hardware problems and cable problems.
v Send test data to the remote equipment to verify correct connection.
v Analyze problems
Note: Use the VFYCMN command to assist in isolating hardware problems that
the system does not detect.
v Run concurrent Link Problem Determination Aid-2 (LPDA-2) tests (see
“Concurrent LPDA-2 tests” on page 317).
v Run wireless diagnostic tests.
v Monitor telephone lines and modems concurrently.
v Monitor modems interface signals.
v Verify a communications link.
For information on running a trace on a communications interface and other tests
that are available, see “Communications tests” on page 316.
Procedure
To verify communications or devices on any iSeries perform the following:
1. Check the operating system.
2. Use one of the following methods to verify communications:
v Type the VFYCMN (Verify Communications) command and press the Enter key.
v On the iSeries Main Menu, select the Problem handling option. On the
Problem Handling display, select the Network problem handling option. Then,
select the Verify communications option.
3. Select the type of connection you want to test (see “Test descriptions”).
Using online help information, follow the system menus; for example, select the
number of times you want the test to run. The system responds with either the
Verification Successful message or the Errors Occurred message.
Note: Before running the verification test (which loads a diagnostic program
into the card), ensure that the customer is not using the resource that
you want to test.
For more details on verifying communications see the iSeries Licensed Internal Code
Diagnostic Aids - Volume 1 information.
Test descriptions
Diagnostic tests are supplied for the following:
v Remote modem
v Local modem
v Modem and coupler
v Communications cable
v Communications I/O adapter
v Communications I/O processor
v External ring
v I/O processor memory
Appendix A. OS/400 309