Chapter 1 Cables and power 35
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
LED 1, Red | LED 2, Green |
LED 4, Green | LED 3, Green |
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 |
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LED 1 | Red | No external transmit clock source is available. |
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LED 2 | Green | The signals CDC and DSR are on between the DSU |
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| and the adapter. LED 2 detects receive link status. |
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LED 3 | Green | The power to the adapter is on and the onboard |
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| microcode is loaded. |
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LED 4 | Green | A cable is detected. |
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