Connecting A Utp Cable Segment To Rj45 Port - Enterasys SecureStack C3G124-24P Installation Manual

Figure 3-13

Connecting a UTP Cable Segment to RJ45 Port

1 RJ45 connector
3. Verify that a link exists by checking that the Link/Activity LED is ON (solid green or
blinking green).
Note: If the cable is connected to one of the PoE RJ45 front panel ports, solid green or
blinking green also indicates that PoE power is available. If the LED is solid amber or
blinking amber PoE power failed. For more details, refer to
4. If the Link/Activity LED is OFF, perform the following steps until it is on:
a. 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.
c. 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 xiv for
information on obtaining this document.
5. If a link is not established or there is no PoE power, contact Enterasys Networks. Refer
to "Getting Help" on page xvi for details.
Repeat all steps above until all connections have been made.
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2 Port 8
Connecting to the Network
3 Port 8 Link/Activity LED
Chapter 4.
SecureStack C3 Installation Guide 3-23
3‐14 and
3‐17