LED blinking indicating status codes
The DW4020 modems’ READY LEDs can blink in various patterns. These patterns correlate to the status codes discussed in Transmit Status messages on page 37 and Receive Status messages on page 42. If you can see the patterns, you also have access to the User Interface. It will be easier to find out what the status of the DW4020 is via the interface than the LED status blinking. The blink patterns are described below for your information.
| Transmit | Corresponding transmit status messages |
READY LED |
| |
| Pattern |
|
|
| |
Off | 4 (or powered off) | |
|
| |
On | 8 | |
|
|
|
2 | Long, | 1 |
1 | Short |
|
|
|
|
2 | Long, | 2 |
2 | Short |
|
|
|
|
2 | Long, | 11 |
3 | Short |
|
|
|
|
1 | Long, | 3 |
1 | Short |
|
|
|
|
1 | Short | 5 |
|
|
|
2 | Short | 10, 13, 14, 15,16, 21, 22, 23 |
|
|
|
3 | Short | 6, 7 |
|
|
|
4 | Short | 12, 17 |
|
| |
Slow | 9,18,19,20 | |
Alternating |
| |
|
| |
Fast | The ITU interface testing – This is a continuous fast blinking pattern, with the Transmit LED being the | |
Alternating | inverse of the Ready LED. No corresponding message. | |
|
|
|
60
Chapter 4 • DW4020 LEDs and troubleshooting
