Nortel Networks 2750 manual T1/E1 CSU/DSU WAN interface card LEDs

48Chapter 2 Cabling the VPN Router and turning the power on

T1/E1 CSU/DSU WAN interface card LEDs

Figure 16 shows the LEDs on the T1/E1 CSU/DSU WAN interface card.

Figure 16 LEDs on the T1/E1 CSU/DSU WAN interface card

LED 1, Red LED 2, Blue

LED 4, Green LED 3, Yellow

CS160012A

Table 12 describes the LEDs on the T1/E1 CSU/DSU WAN interface card.

Table 12 LED indicators on the T1/E1 CSU/DSU WAN interface card

LED	Indicator	Description
LED 1	Red	The red alarm LED is lit when a loss-of-signal (LOS) or
		out-of-frame (OOF) condition is detected on the receive
		signal.
LED 2	Blue	The blue alarm LED is lit when receiving an upstream
		failure denoted by an alarm indication signal (AIS).
LED 3	Yellow	The yellow alarm LED is lit when the far-end equipment
		is in the red alarm condition.
LED 4	Green	The green LED is lit when the condition is normal
		operation.

NN46110-318 02.01