| 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. 129:TMU |
| 3 | Board No. | Number of the fault board 0:TMU 0 1:TMU 1 |
| 4 | PassNo | Number of the passage where the faulty board is located. |
| 5 | SubLink No. | Alarm sub-category number 0～23:The transmission between 0-23 of the E1 port and the upper-level BSC or BTS is abnormal. |
| 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 or module is located 3: BTS30 5: BTS312 10: BTS3012A 11: BTS3006A |
| 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 |
The services of the near-end BTS are interrupted because it cannot communicate with the upper level BSC or BTS.
Check whether the DIP switches S1, S2, S10 and S11 on the TMU panel are correctly set. If no, modify the settings based on the following descriptions:
S1: ON indicates that the impedance over E1 ports 3 and 4 is 75 ohm ; OFF indicates the impedance over the two ports is 120 ohm.
S2: ON indicates that the impedance over E1 ports 1 and 2 is 75 ohm; OFF indicates the impedance over the two ports is 120 ohm.
S10: ON indicates that the outer conductor of E1 links 1 and 2 is grounded while OFF indicates that the outer conductor is not.
S11: ON indicates that the outer conductor of E1 links 3 and 4 is grounded while OFF indicates that the outer conductor is not.
Check whether the alarm is cleared.
Y=> The alarm handling ends.
N=> Go to Step 2.
Y=> Go to Step b.
N=> Go to Step 4.
Y=> The alarm handling ends.
N=> Go to Step 3.
Perform a loopback test on the transmission link at the upper level BSC or BTS. Check whether the indicator LIU corresponding to the peer E1 link is off.
Y=> The alarm may be caused by hardware failure. Contact Huawei Customer Service Center.
N=> The peer transmission link is not available. Repair the peer transmission link and the alarm handling ends.
Replace the TMU and check whether the alarm is cleared.
Y=> The alarm handling ends.