Enterasys Matrix 7G4202-30, Hardware Installation Manual

Page: 54 / 110

Connecting to the Network
3-18 Installation
d. 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 3-8 and Figure 3-9 for four-wire RJ45 connections. Refer to
Figure 3-10 and Figure 3-11 for eight-wire RJ45 connections.
Figure 3-8 Crossover 4-Wire Cable RJ45 Pinouts, Connections Between Hub Devices
Figure 3-9 Straight-Through 4-Wire 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–
À Á
Â
Ã
TX+
TX–
RX+
RX– 2
1
3
6
TX+
TX–
2
1
3
6
RX+
RX–
À Á
Â
Ã