Installation guide

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DIP Switch Settings
DIP
No.
Function ON OFF
1
Force Fiber Port
Duplex
Full Duplex* Half Duplex
“
ON”: Forces Full Duplex on Fiber port.
“OFF”: Forces Half Duplex on Fiber port.
2
Link Fault Pass
Through
Enable* Disable
“
ON”: Enables “Link Fault Pass Through”, the link
status on the TX port will inform the FX port of the
same device and vice versa.
“OFF”: Disables “Link Fault Pass Through”, the
link status on the TX port will not inform the FX
port.
3
Force TP Duplex
Full Duplex*
Half Duplex
(Only when Auto Negotiation (DIP 5) is disabled)
“ON”: Forces Full Duplex on Ethernet port.
“OFF”: Forces Half Duplex on Ethernet port.
4
Force TP Speed
100Mbps*
10Mbps
(Only when Auto Negotiation (DIP 5) is disabled)
“ON”: Forces 100Mbps on Ethernet port.
“
OFF”: Forces 10Mbps on Ethernet port.
5
Auto Negotiation
Enable*
Disable
“
ON”: Enables “Auto Negotiation” function, the
speed and duplex states for each port link segment
are automatically configured using the highest
performance interoperation mode.
“ OFF”: Disables “Auto Negotiation” function, the
speed and duplex states depend on the DIP 3 & 4
configuration.
*Default setting
After changing the DIP switch setting, you will need to power off and then
power on the IMC-21A, or use a pointed object to hold the reset button
down for five seconds to activate the new setting.