Nortel Networks 1050, 1100, 1010 manual Single V.35/X.21 WAN interface card LEDs, Hardware overview

Chapter 1 Hardware overview 33

Table 9 describes the LEDs on the T1/E1 CSU/DSU WAN interface card.

Table 9 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.

Single V.35/X.21 WAN interface card LEDs

Figure 13 shows the LEDs on the single V.35/X.21 WAN interface card.

Figure 13 LEDs on the single V.35/X.21 WAN interface card

LED 1, Red LED 2, Green

LED 4, Green LED 3, Green

CS160011A

Table 10 describes the LEDs on the single V.35/X.21 WAN interface card.

Table 10 LED indicators on the single V.35/X.21 WAN interface card

LED	Indicator	Description
LED 1	Red	No external transmit clock source is available.
LED 2	Green	The signals CDC and DSR are on between the DSU
		and the adapter. LED 2 detects receive link status.

Nortel VPN Router Installation — VPN Router 1010/1050/1100