4–4
DECbridge 500/600 Series Problem Solving
4.2.1
Circuit Breaker
The circuit breaker provides overcurrent protection for the bridge. If an overcurrent
condition causes the circuit breaker to trip, the white center portion of the breaker
pops out and ac power is removed from the bridge. To reset the circuit breaker, push
in the white center portion of the breaker.
4.2.2
Configuration Switches
The eight configuration switches located on the AP/AP2 module are listed in
Table 4–1. A description of each switch follows the table.
Table 4–1:
Configuration Switches
Factory
Switch
Name
Setting
ON (Down)
OFF (Up)
1
Manufacturing OFF
Select manufacturing
Select normal
mode
mode
operating mode
2
Restore default OFF
Restore default
Use current
parameters
parameters on power up
parameters
3
Write access OFF
Allow management write
No management write
(FDDI - Port 1)
1
access on Port 1
access on Port 1
4
Write access OFF
Allow management write
No management write
(Port 2)
1
access on Port 2
access on Port 2
5
Write access OFF
Allow management write
No management write
(Port 3)
2
access on Port 3
access on Port 3
6
Write access OFF
Allow management write
No management write
(Port 4)
2
access on Port 4
access on Port 4
7
External OFF
Enable external loopback Normal operation
loopback
test
8
AUI/ThinWire
3
OFF
Select AUI connection
Select ThinWire
for Port 2
connection for Port 2
1
On the AP module (DECbridge 500 model only), switch 3 controls write access to Port 2
and switch 4 controls write access to Port 1. The DECbridge 600 has no Port 1.
2
Only applicable when 3-port NI(3) module is installed.
3
Only applicable when 1-port NI module is installed.
