Bay Technical Associates 350 User Manual

Using the BayStack 350 10/100 Autosense Switch

4-4

893-00992-B

Before you perform the problem-solving steps in this section, cycle the power to 
the BayStack 350 switch (disconnect and then reconnect the AC power cord); 
then, verify that the switch follows the normal power-up sequence.

When power is applied to the BayStack 350 switch, the LEDs display in the 
following sequence:

1.

After power is applied to the switch, the Power LED turns on within five 
seconds.

2.

The switch initiates a self-test, during which the port LEDs display various 
patterns to indicate the progress of the self-test.

3.

Upon successful completion of the self-test (within 10 seconds after power is 
applied), the Diagnostics LED turns on.

4.

The remaining port LEDs indicate their operational status as described in 
Table 4-2.

All LEDs are off.

The switch is not receiving AC 
power.

Verify that the AC power cord is fastened 
securely at both ends and that power is available 
at the AC outlet.

The fans are not operating or 
the airflow is blocked, causing 
the unit to overheat.

Verify that there is sufficient space for adequate 
airflow on both sides of the switch.

Operating temperature for the switch must 

not exceed 40

°

C (104

°

F). The switch should not 

be placed in the direct sunlight or near warm air 
exhausts or heaters.

The Activity LED for a 
connected port is off or 
does not blink (and you 
have reason to believe 
that traffic is present).

The switch is experiencing a 
port connection problem.

See “Port Connection Problems” on 

.

The switch link partner is not 
autonegotiating properly.

350fbk.book  Page 4  Wednesday, July 9, 1997  4:51 PM