Four-Wire Crossover Cable Rj45 Pinouts For 10/100Base-Tx - Enterasys SecureStack C2 C2G124-24 Hardware Installation Manual

Gigabit and fast ethernet switches

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Verify that a link exists by checking that the Link/Activity LED is ON (solid green or

blinking green). If the Link/Activity LED is OFF, perform the following steps until it is

on:

Verify that the cabling being used is Category 5 or better with an impedance

between 85 and 111 ohms with a maximum length of 100 meters (328 feet).

b. Verify that the device at the other end of the twisted pair segment is on and

properly connected to the segment.

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 3‐15 for four‐wire RJ45 connections. Refer to Figure 3‐16 and Figure

for eight‐wire RJ45 connections.

d. Ensure that the twisted pair connection meets the dB loss and cable specifications

outlined in the Cabling Guide. Refer to "Related Documents" on page xvi for

information on obtaining this document.

If a link is not established, contact Enterasys Networks. Refer to "Getting Help" on

page 1‐7 for details.

Repeat all steps above until all connections have been made.

Figure 3-14