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Chapter 1 Cables and power 35
Nortel VPN Router Installation — VPN Router 1750
Single V.35/X.21 WAN interface card LEDs
The following figure shows the LEDs on the single V.35/X.21 WAN interface
card.
Figure 12 LEDs on the single V.35/X.21 WAN interface card
The following table describes the LEDs on the single V.35/X.21 WAN interface
card.
Table 13 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.
LED 3 Green The power to the adapter is on and the onboard
microcode is loaded.
LED 4 Green A cable is detected.
LED 4, Green LED 3, Green
LED 1, Red LED 2, Green