Serial Port Leds - Allied Telesis AT-CM20x Series Reference Manual

Chapter 1: Converteon™ Fast Ethernet and Gigabit Ethernet Line Cards

Serial Port LEDs

Table 9 lists the serial port LED's provisioned on the Mezzanine Adapter
and are viewable through the line card front panel.
LED Color
SER MODE Green
[1 to 4]
OFF
SER ACT Green
[1 to 4]
OFF
Description
The serial port is operating in RS-232 mode.
The serial port is operating in RS-422/485
mode.
The serial port has established a valid link.
The serial port has detected TX/RX activity.
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