0: system is unusable 
1: action must be taken immediately 
2: critical condition 
3: error conditions 
4: warning conditions 
5: normal but significant condition 
6: informational 
Web User Interface: 
Settings->Configuration->System Log Level 
Phone User Interface: 
None 
To configure the level of the system log via web user interface: 
1.  Click on Settings->Configuration. 
2.  Select the desired level from the pull-down list of System Log Level. 
 
3.  Click Confirm to accept the change. 
The system log level is set as 6, the informational level. 
Note   
   
Informational level may make some sensitive information accessible (e.g., 
password-dial number), we recommend that you reset the system log level to 3 after 
providing the syslog file.