Planet FSD-401SC, Manual

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SOHOConnect Series 20
RJ-45 Pin Specification
When connecting your FSD-401 10/100Mbps Ethernet
Switch to another switch, a bridge or a hub, a modified
crossover cable is necessary. Please review these products
for matching cable pin assignment.
The following diagram and tables show the standard RJ-45
receptacle/connector and their pin assignments for the
switch-to-network adapter card connection, and the straight /
crossover cable for the Switch-to-switch/hub/bridge
connection.
RJ-45 Connector pin assignment
Contact Media Direct Interface Signal
1 TX + (transmit)
2 TX - (transmit)
3 Rx + (receive)
4 Not used
5 Not used
6 Rx - (receive)
7 Not used
8 Not used
The standard cable, RJ-45 pin assignment
The standard RJ-45 receptacle/connector
The following shows straight cable and crossover cable
connection:
Straight cable for Switch (uplink MDI-II port) to switch/Hub or other
devices connection