IBM Nortel 10 - Manual (Page 16)

LEDs
In addition to the OK and GbE switch module error LEDs on the information
panel, each external port on the GbE switch module has a TX/RX LED and a
LINK LED. The following illustration shows the LEDs on the GbE switch
module. A description of each LED follows the illustration.
RS232
TX/RX
LINK
1
TX/RX
LINK
2
TX/RX
LINK
3
TX/RX
LINK
4
3
4
Link
TX/RX
Switch module
error
OK
Note: An amber LED is lit when a system error or event has occurred. To
identify the error or event, check the management module event log. For
additional information, see Chapter 8, “Solving problems,” on page 39.
OK: When this green status LED is lit, it indicates that the GbE switch module
has passed the power-on self-test (POST) with no critical faults and is
operational.
Switch module error: When this amber status LED is lit, it indicates that the
GbE switch module has a fault. If the GbE switch module fails the POST or
detects an operational fault, this LED is lit.
Note: When this LED is lit, the system-error LED on the BladeCenter unit is
also lit.
Link: When this green link status LED is lit on a port, it indicates that there is
a connection (or link) to a device on that connector.
TX/RX: When this green activity LED flashes on a connector, it indicates that
data is being transmitted or received (that is, activity is occurring) between
6 Nortel 10 Gigabit Uplink Ethernet Switch Module: Installation Guide