Chapter 1 Cabling the VPN Router and turning the power on 39Nortel VPN Router Installation — VPN Router 1750Single V.35/X.21 WAN interface card LEDsFigure 12 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 cardTable 13 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 cardLED Indicator DescriptionLED 1 Red No external transmit clock source is available.LED 2 Green The signals CDC and DSR are on between the DSUand the adapter. LED 2 detects receive link status.LED 3 Green Power to the adapter is on and the onboardmicrocode is loaded.LED 4 Green Cable is detected.LED 4, Green LED 3, GreenLED 1, Red LED 2, Green
