| ID | Name | Meaning |
|---|---|---|
| 1 | Site No. | Number of the site where the faulty board or module is located Value range: 0-2047 |
| 2 | Board Type | Number of the type which the faulty board belongs to. 68:DASU（TEU） |
| 3 | Board No. | Number of the fault board 0:TEU 0 |
| 4 | PassNo | Number of the passage where the faulty board is located. |
| 5 | SubLink No. | Alarm sub-category number 255:None |
| 6 | Cell Index | Index of the cell where the board or module is located 0-2047: Cell index of the faulty cell in the data configuration 65535: None |
| 7 | Site Type | Type of the site where the faulty board is located. 3:BTS30; 5:BTS312; 10:BTS3012A; 11:BTS3006A; 12:BTS3012; 13:BTS3006C; 14:BTS3002E; 15:BTS3012AE; 16:BTS3012 II; |
| 8 | RackNo | Number of the rack where the faulty board is located. |
| 9 | BoxNo | Number of the subrack where the faulty board is located. |
| 10 | SlotNo | Number of the slot where the faulty board is located. |
| 11 | Site Name | Site Name |
| 12 | Alarm Attribute | Alarm Character 0:Normal 1:Transient Count |
Services borne by the faulty optical interface are interrupted. If the optical interface connecting to the lower level devices fails, services supported by the lower level devices will be interrupted. If the optical interface connecting to the upper level devices fails, services supported by the devices of the lower level or the local level will be interrupted.
On optical transmission network management system, select the TEU, click "Configuration/Upload/Download Configurations" to upload the board data. Click the "Payload" button in the toolbar to display an interface, where the configuration for "Westward", "Eastward" and "TU" are listed. If "Eastward" has been configured but the corresponding fiber has not been connected, then remove the configuration of Eastward service. View whether the alarm is cleared.
Y=> The alarm handling ends.
N=> Go to Step 2.
Check to ensure the power supply for other network elements (NE) in the optical transmission network is normal, and the cable connecting to the local BTS has been connected properly, and the transmission devices of the upper layer are in normal operation. Clear the faults of other NEs if any. View whether the alarm is cleared.
Y=> The alarm handling ends.
N=> Go to Step 3.
Check whether the tail fiber is neat, and whether the flange is properly connected. Clean the tail fiber if dirty and reconnect the flange properly. View whether the alarm is cleared.
Y=> The alarm handling ends.
N=>Go to Step 4.
Measure the power of optical signals from the peer end to see whether the result is smaller than -28dBm.
Y=>The optical path is normal. Go to Step 5.
N=>Since the attenuation of optical signals is overmuch or the components of the optical path are in poor contact, the BTS cannot receive optical signals. Clear the fault of the peer end. The alarm handling ends.
Perform self-loop for western optical fiber and eastern optical fiber. View whether the alarm is cleared.
Y=> The alarm handling ends.
N=> Huawei Customer Service Center. The alarm may be caused by TEU hardware failure.