Enterasys Networks 2H252-25R manual Connecting the Twisted Pair Segment

Connecting to the Network

Figure 3-6 Connecting the Twisted Pair Segment

LED MODE Switch in RX–TX position

Receive (RX)

LED

MODE

RX-TX

	Transmit (TX)
DPX-SPD

FAST ETHERNET	WORKGROUP	SWITCH
	LED
	MODE
	RX-TX
	DPX-SPD
		PWR
	RESET	CPU
2H252-25R
	COM

2		4		6		8
						7
				5
1		3
						8X
	2X		4X		6X

					16		18		20		22	24
				14							21	23
		12							19
10							17
				13	15
		11										24X
9											22X
						16X		18X		20X
			12X		14X
	10X

Twisted Pair Cable

LED MODE Switch

Port

4005_00_07

3.Verify that a link exists by checking that the port RX LED is on (flashing amber, blinking green, or solid green). If the RX LED is off and the TX LED is not blinking amber, perform the following steps until it is on:

a.Verify that the LED switch located near the COM port of the device is in the left-most position (RX and TX LED indicators).

b.Verify that the UTP cabling used is Category 3 (for 10BASE-T) or Category 5 (for 10BASE-T or 100BASE-TX). The Category 5 cabling must have an impedance of between 85 and 111 ohms.

NOTE: If a port is to operate at 10 and 100 Mbps, Category 5 cabling must be used. Refer to Section 2.3 for information about 100BASE-TX networks and cabling.

c.Verify that the 100BASE-TX device at the other end of the twisted pair segment is powered up.

d.Verify that the RJ45 connector on the twisted pair segment has the proper pinouts. Depending on what device is connected to the 2H252-25R, a straight-through or crossover cable may be used. Figure 3-7shows the wiring for both types of cables.

e.Check the cable for continuity.

3-10Installation