Nortel 1010 Manual De Usuario
![Nortel](https://files.manualsbrain.com/attachments/41d8158aa9dad39109585817452a5513bedfdded/common/fit/150/50/b0df237683acfcba182fca1886fb0237fc1e06fba6e3e77a0d64d1463e4c/brand_logo.jpeg)
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.
Single V.35/X.21 WAN interface card LEDs
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
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.
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.
CS160011A
LED 4, Green
LED 3, Green
LED 1, Red
LED 2, Green