Enterasys Networks Enterasys Platinum Distributed Forwarding Engine 7G4285-49 - Manual (Page 47)

Connecting to the Network
DFE-Platinum Series Hardware Installation Guide 3-15
e. Verify that the RJ45 connectors on the twisted pair segment have the proper
pinouts and check the cable for continuity. Typically, a crossover cable is used
between hub devices. A straight‐through cable is used to connect between
switches or hub devices and an end user (computer). Refer to
Figure 3‐5 and
Figure 3‐6 for four‐wire RJ45 connections. Refer to Figure 3‐7 and Figure 3‐8 for
eight‐wire RJ45 connections.
Figure 3-5 Four-Wire Crossover Cable RJ45 Pinouts, Connections Between Hub
Devices
Figure 3-6 Four-Wire Straight-Through Cable RJ45 Pinouts, Connections
Between Switches and End User Devices
1 RJ45 device port 3 RJ45-to-RJ45 crossover cable
2 Other device port 4 RX+/RX- and TX+/TX- connections.
These connections must share a common color pair.
1 RJ45 device port 3 RJ45-to-RJ45 straight-through cable
2 Other device port 4 RX+/RX- and TX+/TX- connections.
These connections must share a common color pair.
TX+
TX–
RX+
RX– 2
1
3
6
TX+
TX–
2
1
3
6
RX+
RX–
А Б
В
Г
TX+
TX–
RX+
RX– 2
1
3
6
TX+
TX–
2
1
3
6
RX+
RX–
А Б
В
Г