Digi PortServer II User Manual

90030500B Troubleshooting Page 193
Test 3 - Timer Test
This tests the timer to ensure that it counts and interrupts. It tests the real-time clock,
checking the set time for legal values. It also tests the battery-backed RAM in real-
time clock.
Test 4 - Built-in UART and External EBI Internal Loopback Test
This tests the UARTS within PortServer II, and also the external EBI expansion mod-
ules with an internal loop-back test. It tests that the UARTs interrupt and that data
loops back.
Test 5 - Built-In UART and External EBI External Loopback Test
Same as Test 4, but uses an external loopback. From the front panel, press the right
pushbutton (
>
) to select the port to test. The display will cycle from
01
to
16
(or
higher, if you have expansion modules connected) plus
All
. With the number of the
port to test displayed, press the left pushbutton (
<
) to start the test.
Test 6 - Test Ethernet Internal Loopback
This tests the 10BaseT and 10Base2 circuits within PortServer II.
Test 7 - Test Ethernet External Loopback
This verifies correct operation of the Ethernet interfaces to the external network. You
must have a dummy network (for example, a “T” connector with termination resistors)
attached to each Ethernet connector for this test to pass.
Test 8 - Test Flash ROM
(Read Only) This verifies that the Flash ROM can be read.
Test 9 - Watchdog Timer Test
This test checks out the watchdog timer that is used to check system reliability.

Digi PortServer II Specifications

General

Brand	Digi
Model	PortServer II
Category	Server
Language	English