| 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. 107:BTS3900E |
| 3 | Board No. | Number of the fault board 0-3: BTS3900E |
| 4 | PassNo | Number of the passage where the faulty board is located. |
| 5 | SubLink No. | Alarm sub-category number 0:E1 port No.0 1:E1 port No. 1 |
| 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. 30:BTS3900E; |
| 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 |
| 13 | E1 Port Number | E1 port number 0:E1 port No.0 1:E1 port No.1 |
When the alarm is generated, the BTS fails to provide services properly, which leads to cells of the BTS out of services, call drops, and handover failures.
If the fault due to broken Abis transmission links is not rectified within 15 minutes, the BTS reset is triggered.
If the DIP switch is correctly set, check whether the alarm is cleared.
The DIP switch has four bits. Bit 0 and 1 are used to set the BTS/RRU mode, E1 unbalanced mode, E1 balanced mode, and T1 mode.
Bit 0 and Bit 1: 0 refers to the ON status and 1 refers to the OFF status.
If the BTS3900E is set to the E1 unbalanced mode, E1 balanced mode, and T1 mode, you can infer that the BTS3900E is in BTS mode.
The settings of Bit 0 and Bit 1 are as follows:
00: E1 unbalanced mode (75 ohms)
01: E1 balanced mode (120 ohms)
10: T1 mode
11: RRU mode
Y => The alarm is cleared. End the alarm handling.
N =>The alarm is not cleared. Go to procedure 2.
Perform the local self-loop on the RX and TX ends of the BTS and check whether the LIU LED on the panel is OFF.
Y=> The LIU LED is OFF. The transmission is recovered. Check whether the alarm is cleared. If yes, end the alarm handling. If no, go to procedure [3].
N=> The LIU LED is ON. Go to procedure 3.
Perform self-loop on transmission links from the BSC or upper-level BTSs and check whether the LIU LED of the E1 link at the peer end is OFF.
Y=> The transmission links at the peer end are normal. The cause may be the hardware faults.
Contact Huawei Customer Service Center.
N=> The transmission links at the peer end are abnormal. Repair the link and end the alarm handling.
Y=> The alarm is cleared. End the alarm handling.
N=> The alarm is not cleared. Go to procedure 5.
Replace the BTS3900E Module, and check whether the alarm is cleared.
Y=> The alarm is cleared. End the alarm handling.
N=> The alarm is not cleared. Contact the Huawei Customer Service Center.