D LED
LED Indicator | Description |
Off | • The ISDN physical interface is not activated. The |
| LINK LED might provide additional status |
| information. |
Flashing | • The ISDN physical interface is activated and |
| initializing. Continuous flashing indicates an |
| error in the initialization process. No data |
| transmission is possible. |
| • In the case of continuous flashing, AT status |
| commands can be used to identify the problem. |
| Note: Check your SPID. Most often, problems result |
| from incorrectly entered SPIDs. |
Steady | • The ISDN physical interface is initialized and |
| ready to place calls. |
|
|
LINK LED |
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|
LED Indicator | Description |
Off | • The ISDN physical interface is not synchronized, |
| or is improperly connected. In Europe, however, |
| this indicates an idle condition. |
Flashing | • The ISDN physical interface is synchronizing. |
Steady | • The ISDN physical interface is activated. The D, |
| B1, and B2 LEDs might provide additional status |
| information. |
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|
