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CSC-MEC Card LEDs
On the CSC-MEC, an LED is located to the right of each port. (See Figure 15.) After the system has
booted, the LED for each connected port should be on.
Ethernet 0 LED
Figure 15
CSC-MEC Card—Front-Edge View
Applique LEDs
The three green LEDs on the 10BaseT applique, shown in Figure 16, indicate the following:
•
LINK—ON when a good link on the receive data (RD) pair has been established.
•
RCV—ON to indicate that a packet has been received from the network.
•
XMT—ON to indicate that a packet has been sent from the router.
XMT
RCV
LINK
Figure 16
10BaseT Applique Status Indicator LEDs
At power up, the LINK LED is on and remains on if it is connected to a 10BaseT link that is powered
up. This LED indicates that a good link has been established. If it does not come on, check the
opposite end of the link to ensure that it is powered up and that the cable is securely installed. If the
LED still is not on, switch the transmit and receive pair at one end of the link and restart the system.
When a good link is established, the RCV LED will flash or remain on to indicate packet traffic on
the link. The XMT LED will be on when the unit transmits data over the link
If the opposite end of the link is connected to a hub, the hub will perform a crossover function, which
means that the transmitter from the unit goes to the receiver of the hub, and the transmitter from the
hub goes to the receiver of the unit. This configuration is correct; however, if the unit connects to an
external media attachment unit (MAU), the crossover function must be performed in the attaching
wires. Otherwise, the two transmit wires are connected to each other, as are the two receive wires.
Note The Ethernet AUI appliques have no LEDs.
Installing the CSC-MEC and CSC-C2MEC Multiport Ethernet Controller Cards 23
Ethernet 5 LED
Installation
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