D-Link DGS-1520 User Manual - Page 500

DGS-1520 Series Gigabit Ethernet Smart Managed Switch Web UI Reference Guide Fault messages: • Open - This pair is left open. • Short - Two lines of this pair is shorted. • CrossTalk - Lines of this pair is short with lines in other pairs. • Unknown - The diagnosis does not obtain the cable status, please try again. • NA - No cable was found, maybe it's because cable is out of diagnosis specification or the quality is too bad. DDM This folder contains windows that perform Digital Diagnostic Monitoring (DDM) functions on the Switch. There are windows that allow the user to view the digital diagnostic monitoring status of SFP/SFP+ modules inserting to the Switch and to configure alarm settings, warning settings, temperature threshold settings, voltage threshold settings, bias current threshold settings, Tx power threshold settings, and Rx power threshold settings. DDM Settings The window is used to view and configure the action that will occur for specific ports when an exceeding alarm threshold or warning threshold event is encountered. To view the following window, click OAM > DDM > DDM Settings, as shown below: Figure 10-2 DDM Settings Window The fields that can be configured in DDM Global Settings are described below: Parameter Transceiver Monitoring Traps Alarm Transceiver Monitoring Traps Warning Description Select to enable or disable the transceiver monitoring traps alarm feature here. Select to enable or disable the transceiver monitoring traps warning feature here. Click the Apply button to accept the changes made. The fields that can be configured in DDM Shutdown Settings are described below: Parameter Unit From Port - To Port State Description Select the Switch unit that will be used for this configuration here. Select the appropriate port range used for the configuration here. Use the drop-down menu to enable or disable the DDM state. 490