Register Status; System Info - D-Link DVX-2004 User Manual

support polarity reversal function, meanwhile, you must configure relevance parameters
of polarity reversal in trunk configuration for the IP PBX.

5.3 Register Status

Check SIP/ IAX2 User, and SIP/IAX2 Trunk status. Click【Register Status】to display the
diagram as below:

5.4 System Info

Check OS version, firmware version and memory, etc from here.
Click【System Info】to display the diagram as below:
43