ALM-11332 IP clock abnormal alarm

Description

IP clock abnormal alarm is classified into IP clock link abnormal alarm, IP clock unlocked alarm, IP clock source lost alarm, and IP clock great frequency offset alarm. The specific alarm type can be found in the local log of the DPTU. [1] IP clock link abnormal alarm: This alarm is reported when the clock link is abnormal or the handshake fails in IP transport mode. [2] IP clock unlocked alarm: This alarm is reported when the IP clock is out of lock. [3] IP clock source lost alarm: This alarm is reported when the IP clock source is lost. [4] IP clock great frequency offset alarm: This alarm is reported when the frequency offset of the IP clock source is great.

Attribute

Alarm ID	Alarm Severity	Alarm Type
11332	Major	Fault

Parameters

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. 86:DPTU
3	Board No.	Number of the fault board 1: DPTU on COMM1 2: DPTU on COMM2
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. 12:BTS3012; 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

Impact on the System

IP clock link abnormal alarm: When the alarm occurs, the BTS cannot communicate with the clock server and the clock packets cannot be received. The BTS cannot receive the clock input.
IP clock unlocked alarm: When the alarm occurs, the phase-locked loop is out of the locked state and the clock synchronization fails. In this case, the services are greatly affected.
IP clock lost alarm: When the alarm occurs, the BTS does not have the clock input and the clock synchronization fails. In this case, the services are greatly affected.
IP clock great frequency offset alarm: When the alarm occurs, frequency offset between the BTS and the clock is great and the BTS cannot enter the locked state to perform clock synchronization. In this case, the services are greatly affected.

System Actions

None.

Possible Causes

The data configuration of the BTS IPCLK is incorrect.
The connection between the BTS and the clock server is faulty.
The clock server is faulty or the configuration of the clock server is faulty.
The frequency output of the clock server is incorrect.
The 13 MHz frequency output corresponding to the DA of the DTMU is incorrect.

Procedure

Connect securely the Ethernet cable and check whether the alarm is cleared.
Y=> The alarm handling ends.

N => Go to step 2.
Short circuit the FE0 and FE1. Check whether the alarm is cleared.
Y=> The alarm handling ends.

N => Go to step 3.
Replace the board and check whether the alarm is cleared.
Y=> The alarm handling ends.

N => Please contact Huawei Customer Service Center.