Enterasys Gold Distributed Forwarding Engine 4G4205-72 Hardware Installation Manual page 50

Connecting to the Network
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.
b. Each time the GROUP SELECT button is pressed for less that one second, the
c.
d. Verify that the device at the other end of the twisted pair segment is on, and
e.
3-16 Installation
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
To view the receive and transmit activity on a group of segments, press the
GROUP SELECT button for less than one second (see Figure
group of interest (Groups 1 through 4).
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.
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.
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 3‐6 for four‐wire RJ45 connections. Refer to Figure 3‐7 and Figure
eight‐wire RJ45 connections.
Status" on page 3-19.
3‐4) to step to the
3‐5 and
3‐8 for