Table 1 | LEDs (continued) |
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Feature Card | LED | State | Description | |
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CT3 feature |
| ACTIVITY (ACT) | Fast flicker | The feature card is up and running. |
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| Slow flicker | The feature card is not yet fully functional. | |
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| OK/MAINT | On (green) | The feature card passed initial |
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| is operating normally. |
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| Yellow | • The feature card is busied out, but there are active calls. |
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| Once all the calls are terminated the feature card will be |
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| powered off. |
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| • The feature card is not functioning correctly. |
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| Off | All calls associated with the feature card have been shut down, |
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| and it is safe to remove the card with the system powered on. |
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| M13 Alarm (MA) | On | One of the following is present on the T3 line: |
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| • Received alarm indication signal (RAIS) |
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| • Loss of signal (LOS) |
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| • Receive RED alarm (RRED) |
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| • |
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| Off | The operating condition is normal. |
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| Remote Alarm (RA) | On | A T1 alarm condition has been encountered by software. |
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| Off | The operating condition is normal. |
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| Local Alarm (LA) | On | A T1 alarm condition has been encountered by software for a |
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| particular port. |
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| Off | The operating condition is normal. |
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| T3 EN/DIS | Green | A CT3 feature card line connection exists, enabling normal |
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| operation. |
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| Yellow | Normal operation is disabled. |
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| Low signal (LOS) | On | The T3 line interface unit (LIU) is experiencing a loss of signal. |
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| Off | Remains off when operating condition is normal. |
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| Network Loop | On | At least one T1 is unavailable. |
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| (LOOP) |
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| Off | The operating condition is normal. | |
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Universal |
| ACTIVITY (ACT) | Flickering | There is call activity on the feature card. |
port and |
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| OK/MAINT | Green | The feature card passed initial | |
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| is operating normally. | |
feature card |
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| Yellow | • The feature card is busied out, but there are active calls. | |
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| Once all the calls are terminated the feature card will be |
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| powered off. |
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| • The feature card is not functioning correctly. |
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| Off | All calls associated with the feature card have been shut down, |
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| and it is safe to remove the card with the system powered on. |
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14
