Nortel Networks 114200-E manual Describes the base module Ethernet 10BASE-T LEDs

	Operating the ARN
Table 3-1.	Base Module Diagnostic LEDs (continued)
LED	Meaning
RPS	Lights and remains on when the redundant power supply (optional) is
	operating.
Fan	Lights and remains on if one or more ARN cooling fans stop operating.
Base	Lights and remains on when the base module is operating properly.
	Flashes slowly to indicate that the module is running its diagnostic
	tests. Flashes rapidly to indicate that the module failed its diagnostic
	tests.
Adapter1	Lights and remains on when adapter module #1 is operating properly.
	Flashes slowly to indicate that the module is running its diagnostic
	tests. Flashes rapidly to indicate that the module failed its diagnostic
	tests.
Adapter2	Lights and remains on when adapter module #2 is operating properly.
	Flashes slowly to indicate that the module is running its diagnostic
	tests. Flashes rapidly to indicate that the module failed its diagnostic
	tests.
Expansion	Lights and remains on when an expansion module is installed and
	operating properly. Flashes slowly to indicate that the module is running
	its diagnostic tests. Flashes rapidly to indicate that the module failed its
	diagnostic tests.
DCM	Lights and remains on when an RMON DCM is installed and operating
	properly. Flashes slowly to indicate that the module is running its
	diagnostic tests. Flashes rapidly to indicate that the module failed its
	diagnostic tests.
PCMCIA	Lights and remains on when the ARN contains a flash memory card in
	its PCMCIA slot.

Ethernet 10BASE-T LEDs

Table 3-2 describes the base module Ethernet 10BASE-T LEDs.

Table 3-2.	Base Module Ethernet 10BASE-T LEDs
LED		Meaning
Tx (Transmit)		Lights when the Ethernet interface transmits data.
Rx (Receive)		Lights when the Ethernet interface receives data.
Cl (Collision)		Lights when the Ethernet interface detects a collision.

114200-E Rev 00 3-3