Polycom DOC2237A manual Module Name Color Description

Chapter 5 - System Maintenance

•7 LEDs on Net-E1/Net-T1 ISDN Network Interface Module, Net-4 ISDN Network Interface Module, ATM Network Interface Module and H.323 Network Interface Module

•5 LEDs on NET-2 ISDN Network Interface Module

•11 LEDs on NET-8 ISDN Network Interface Module

The system uses these LEDs to indicate operating states. The LEDs on the Net-2/Net-4/Net-8 are tri-color. Depending on the states of the LEDs inputs, the LED can be off, green, red or yellow. The LEDs on the front panel are described in Table 5-1.

Table 5-1: Front Panel LEDs

Module	Name	Color	Description
Main Control	CRITICAL	Red	A critical fault is detected on the
Module (top			MGC unit
group)	MAJOR	Red	A major fault exists on the MGC
			unit
	MINOR	Yellow	A minor fault exists on the MGC
			unit
	L0	Green	Reserved
Main Control	POWER	Green	Power Supply is operating
Module (bottom			normally.
group)	L1	Green	Only one ISDN/T1-CAS Network
			card is installed in the MCU, and
			it is configured as the Primary
			clock source. The LED is turned
			off when no ISDN Network card
			is installed.
	L2	Green	A second ISDN/T1-CAS
			Network module is installed and
			configured as the backup clock
	L3	Yellow/	LED is active when the MCU is
		orange	restarted.

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