Enterasys Networks A2H124-48P, A2H124-24P manual Connecting a UTP Cable Segment to RJ45 Port

Connecting to the Network

Figure 3-12 Connecting a UTP Cable Segment to RJ45 Port

1	3
		5
2		7
	4	9
		6
		8
		10

Â

11							1	1
	13							2
		1
								3
12		5	17
				19				4
	14				21
		16				23		5
			18					6
				20
					22			7
						24		8
							2	9
								10

Á

À

11 12

11

		12
1 RJ45 connector	2 Port 8	3 Port 8 Link/Activity LED

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 Chapter 4.

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 but this is not necessary. A straight‐through cable can be used to connect between the switch and any device. Refer to Figure 3‐13 and Figure 3‐14 for four‐wire RJ45 connections. Refer to Figure 3‐15 and Figure 3‐16 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.

5.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.

3-20 Hardware Installation