Functions of the Front Panel Lights
Initial Power Up, Calibration, and Registration
The following chart illustrates the sequence of steps and the corresponding appearance of the front panel lights on the cable modem during power up, calibration, and registration on the network. Use this chart to troubleshoot the power up, calibration, and registration process of your cable modem.
Note: After the cable modem completes step 8 (Registration Completed), the modem proceeds immediately to Normal Operations, on page 12.
Front Panel Lights During Initial Power Up, Calibration, and Registration
| Step | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
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Front Panel | Power | Self | Downstream | Downstream | Ranging | Requesting | Registering | Registration | |
| Light | Up | Test | Scan | Signal Lock |
| IP Address |
| Complete |
1 | Power | On | On | On | On | On | On | On | On |
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2 | Receive | Off | On | Off | Off | Occasional | Occasional | Occasional | On |
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| Blinking | Blinking | Blinking |
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3 | Send | Off | On | Off | Off | Occasional | Occasional | Occasional | On |
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| Blinking | Blinking | Blinking |
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4 | Cable | Off | On | Slow Blinking | Momentary | Off | Blinking 2 | Blinking 4 | On |
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| 1 Blink | On |
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5 | PC1 | Off | On | Off, On or | Off, On or | Off, On or | Off, On or | Off, On or | Off or On |
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| Blinking | Blinking | Blinking | Blinking | Blinking |
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6 | Line 1 | Off | On | Off | Off | Off | Off | Off | Off |
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7 | Line 2 | Off | On | Off | Off | Off | Off | Off | Off |
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1The PC light is on whenever a PC is connected to the modem, and it blinks to indicate that data is being transferred. If the modem is used to provide telephone service only and is not connected to a PC, the PC light is off.
Continued on next page
4004041 Rev A | WebSTAR DPX2203 or EPX2203 VoIP Cable Modem User’s Guide | 11 |
