Enterasys Networks Enterasys Platinum Distributed Forwarding Engine 7G4285-49 - Manual (Page 46)

Connecting to the Network
3-14 Installation
Figure 3-4 Connecting a Twisted Pair Segment with RJ45 Connector
3. Verify that a link exists by checking that the port RX (Receive) LED is ON (flashing
amber, blinking green, or solid green). If the RX LED is OFF and the TX (Transmit)
LED is not blinking amber, perform the following steps until it is on:
a. To view the receive and transmit activity on a group of segments, press the
GROUP SELECT button for less than one second (see
Figure 3‐4 ) to step to the
group of interest (Groups 1 through 4).
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.
1 RJ45 cable connector 2 RJ45 port connector 3 GROUP SELECT button
Note: If the RX and TX LEDs of a port do not indicate a link and the end-point device is a
PD, you may have a port without 48 Vdc to operate the PD. To check the PoE Port Status,
refer to “
Verifying PoE Port Status ” on page 3-17.
1X
G
R
O
U
P
1
11X
OFFLINE/
RESET
COM
MGMT
GROUP
SELECT
GROUP
1
2
3
4
5
6
7
8
9
10
11
12
12 X
POE
CPU
1
2
3
4
7G4285-49
Gb ENET
RX
TX
А
Б В