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11.3 DDM 
DDM can test fiber ports on switch, and display the parameters of the fiber ports, such as 
temperature, voltage, receiving power and transmitting power. 
Click Device Management> DDM to show the following page: 
Figure 11-5 DDM 
 
 
11.4 Information Center 
The information center is an information hub of the system, which can classify and manage 
all the systematic information. The information center provides network manager and 
developer the ability of monitoring work conditions of network and diagnosing network 
failure through the combination with debug program (debugging commands). 
11.4.1 Parameter Settings 
User can configure classification and management of switch system information in Parameter 
Settings page. 
Click Device Management> Information Center > Parameter Settings, the configuration page 
is displayed as follows. 
Figure 11-6 Parameter Settings