Enterasys Networks Enterasys Gold Distributed Forwarding Engine 4H4285-49 - Manual (Page 43)

Connecting to the Network
Matrix DFE-Gold Series PoE Module 4H4285-49 Installation Guide 3-15
c. Verify that the cabling being used is Category 5 UTP with an impedance between
85 and 111 ohms. If the port is to operate at 100 Mbps, category 5 cabling must be
used.
d. Verify that the device at the other end of the twisted pair segment is on, and
properly connected to the segment.
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
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.
TX+
TX–
RX+
RX– 2
1
3
6
TX+
TX–
2
1
3
6
RX+
RX–
В
А Б
Г