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Communication Connections
EDS-308 models have 6, 7, or 8 10/100BaseT(X) Ethernet ports, and 2, 1, or 0 (zero) 100BaseFX
(SC-type connector) fiber ports. EDS-305 models have 4 or 5 10/100BaseT(X) Ethernet ports, and
1 or 0 (zero) 100 BaseFX (SC-type connector) fiber ports.
10/100BaseT(X) Ethernet Port Connection
The 10/100BaseT(X) ports located on EDS’s front panel are used to connect to Ethernet-enabled
devices.
Below we show pinouts for both MDI (NIC-type) ports and MDI-X (HUB/Switch-type) ports, and
also show cable wiring diagrams for straight-through and cross-over Ethernet cables.
MDI Port Pinouts
MDI-X Port Pinouts
8-pin RJ45
Pin Signal
Pin
Signal
1 Tx+
1
Rx+
2 Tx-
2
Rx-
3 Rx+
3
Tx+
6 Rx-
6 Tx-
RJ45 (8-pin) to RJ45 (8-pin) Straight-Through Cable Wiring
Straight-Through Cable
RJ45 Plug Pin 1
Switch Port
RJ45
Connector
RJ45
Connector
Tx+
Tx-
Rx+
Rx-
NIC Port
Cable Wiring
3
3
6
6
1
1
2
2
Rx+
Rx-
Tx+
Tx-
RJ45 (8-pin) to RJ45 (8-pin) Cross-Over Cable Wiring
Cross-Over Cable
RJ45 Plug Pin 1
Switch Port
(NIC Port)
RJ45
Connector
RJ45
Connector
Tx+
Tx-
Rx+
Rx-
(Rx+)
(Rx-)
(Tx+)
(Tx-)
(Tx+)
(Tx-)
(Rx+)
(Rx-)
Switch Port
(NIC Port)
Cable Wiring
3
3
6
6
1
1
2
2
Rx+
Rx-
Tx+
Tx-
1
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