Four-Wire Crossover Cable Rj45 Pinouts, Connections Between Hub Devices - Enterasys Matrix 7H4385-49 Hardware Installation Manual

b. Each time the GROUP SELECT button is pressed for less that one second, the
GROUP LED lights up in sequence, indicating which Group is selected. The
receive and transmit activity for that group of segments is then indicated by the
RX and TX LEDs for each segment.
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
Figure 3‐6 for four‐wire RJ45 connections. Refer to Figure 3‐7 and Figure
eight‐wire RJ45 connections.
Figure 3-5 Four-Wire Crossover Cable RJ45 Pinouts, Connections Between Hub
Devices
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1 RJ45 device port
2 Other device port
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3 RJ45-to-RJ45 crossover cable
4 RX+/RX- and TX+/TX- connections.
These connections must share a common color pair.
DFE-Platinum Series Hardware Installation Guide 3-17
Connecting to the Network
3‐5 and
3‐8 for
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