| 1. | Administration unit alarm indication signal au - ais 管理单元告警指示信号 |
| 2. | Multiplex section alarm indication signal ms - ais 复用段告警指示信号 |
| 3. | Ms - ais : mutiplex section - alarm indication signal 复用段告警指示信号 |
| 4. | Tributary unit alarm indication signal tu - ais 支路单元告警指示信号 |
| 5. | Ais : alarm indication signal 告警指示信号 |
| 6. | Alarm indication signal ais 告警指示信号 |
| 7. | Aisalarm indication signal 告警指示信号 |
| 8. | Alarm indication signal 告警指示信号 |