Page 5-1CHAPTER 5 — MAINTENANCE & TROUBLESHOOTING
CHAPTER 5MAINTENANCE &TROUBLESHOOTING

Diagnostics

When the AGILE 5250 OPTIMA either powers up or is reset, it performs a
set of diagnostics on the internal hardware. These diagnostics include a
ROM checksum test to ensure that the ROM has not been corrupted, a
RAM test, and an internal twinax loop-back test. (The internal twinax
loop-back test tests the OPTIMA twinax communication controller chip,
and it is permissible to be connected to the network during this operation.)
To perform these tests continuously, press g on power up or reset.
An additional diagnostic is available on power up or reset. This diagnostic
will test the transmit and receive circuits of the OPTIMA.
NOTE: to perform this test, the twinax T must be attached to the
OPTIMA twinax port, and both cables mu st be disconnected from the
T connector so that it only serves as a terminator for the test.
Failure to disconnect can cause permanent damage to the equipment.
To perform this additional test on power up or reset, press d while either
turning on the OPTIMA or while pressing the RESET button. To perform
continuous testing of the OPTIMA, including the internal loop-back test,
press both g and d while either turning on or resetting the OPTIMA.

Twinax Addressing

After power-on hardware diagnostics and during twinax initialization, the
twinax port is monitored to check the OPTIMA twinax configuration
against the actual port configuration. Before the OPTIMA will begin
twinax communications on a twinax address, it monitors the line to ensure
that the selected address is not being used by another device on the twinax
network. If the address is already used, the OPTIMA will not use the
address, but it will flag the configuration error to the user. This is not a
fatal error. Normal operation will proceed on the nonconflicting addresses.
After twinax initialization, during normal operation, the configured twinax
addresses are continually monitored by the OPTIMA. The LCD indicates
where any twinax address error is occurring by flashing the twinax address
indicator.