IBM 86884RX Maintenance Manual - Page 71
Continue, Serial, Hardware, Internal, Loopback, Attention, External, LoopBack, Status, RXE-100
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The test routines check all serial port controllers at speeds from 300 to 115,200 bps (up to 460,800 bps if a 16550 UART is installed). 3. Select the number of data bits, number of stop bits, and parity type for the serial port. 4. Select a field using the - and + keys and set the parameters. 5. Select Continue, and press Enter. The serial port tests include the following: v Serial Port Hardware Test The serial port hardware test diagnoses hardware attached to the serial port. v Internal Loopback Test This test verifies the proper functionality of the transmitter and receiver register in the serial port using the internal loopback mechanism. Attention: Running this test with console redirection might slow down the server. v External LoopBack Test This test verifies the proper functionality of the transmitter and receiver register in the serial port. This test requires an external loopback connector to be physically connected to the serial port. Attention: Running this test with console redirection might slow down the server. v FIFO Test This test verifies that the first-in first-out (FIFO) function in the serial port is functioning properly. This test is enabled only for UART 16550 and above. v Baud Rate Test This test verifies the accuracy of the data being transferred by the serial port at different baud rates. For the serial port test error codes, see "Serial port test error codes" on page 169. LED Test Use this test to diagnose all LEDs that can be set using software and visible after the server is assembled. This test lights all LEDs in the server and prompts you to check that they are all lit; then, it turns off all LEDs and prompts you to check that they have been turned off. RXE Port Test Use this test to diagnose problems with the RXE ports. The RXE Port Test consists of the following sub-tests: v RIOG (RXE) Status This test displays the status of the RXE ports and the attached RXE-100 units. v RIOG Port A Test This test verifies the quality of the connection from the RXE Expansion Port (A) connector to a remote I/O enclosure. v RIOG Port B Test This test verifies the quality of the connection from the RXE Expansion Port (B) connector to a remote I/O enclosure. v RXE-100 Side A Port Test This test verifies the quality of the connection from the RXE-100 Side A connector to the RXE Expansion Port. Chapter 3. Diagnostics 61