Nortel Networks 1010 User Manual

Chapter 1  Hardware overview  33

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

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

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

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

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

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

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.

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

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.

CS160011A

LED 4, Green

LED 3, Green

LED 1, Red

LED 2, Green