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Failure in the Configuration of an MD5500 PSTN Subscriber Due to the Error of Setting the Physical Information About a Port

Publication Date:  2012-07-25 Views:  155 Downloads:  0

Issue Description

Operator C in R country uses the N2000 BMS to manage the MD5500. The version information is as follows:
N2000 BMS version: N2000 BMS V200R008B02D061SP21
NE version: MD5500 V100R011B02D055SP04
The customer tries to add the PSTN subscriber for the MD5500 on the N2000 BMS (see Attached Figure 1). The system prompts “Input parameter error" (see Attached Figure 2). After the synchronization of the NE, it is found that the PSTN subscriber is configured successfully (see Attached Figure 3). 

Alarm Information


Handling Process

1. Consult the R&D engineers and obtain related debug and log information.
2. After the analysis, it is found that a parameter is configured incorrectly. The range of High Level Pulse Width is 20�500. But the customer sets the value to 15.
3. Change 15 to a certain value between 50 and 5000 and configure the subscriber again. No error information is displayed.
4. The analysis for the problem is as follows: The range of High Level Pulse Width is 20�500, but the value shown in the Attached Figure 1 is not within the range. The Port Protocol Info and Port Physics Info are two different MIB tables. If the parameters are configured incorrectly in Port Physics Info, the client reports an error without refreshing the configuration. After the NE is synchronized, the parameters in Port Protocol Info are correct. Hence, the configuration information of the subscriber is displayed on the N2000 BMS. 

Root Cause

The problem can be traced to the following causes:
1. Error occurs when the N2000 BMS reads data from or writes data to the databases.
2. The MD5500 reports the write data error to the N2000 BMS.
3. The data configuration is incorrect. 


If similar problems occur, check the configuration first. Lack of attention to the configuration information in the Port Physics Info MIB table causes substantive time in collecting and locating information.