This is Center Picture, Make sure it is running

Make sure, Firewall open the port
200001

Goto DVR system.

Make sure
Stop Recording, Stop all Network services.

Go Setup Button (Config button)

Goto System Configuration

Go to Camera 1

Make sure you check

Sent to Center

so, as other camera you want to sent signal to center....

Click OK when finish setting.

Then, You are on the Main Screen.

Go to Remote button (or call Network button "3 computer icons")

Click Connect to Center

type Your Central IP Address in here.
for example, 123.123.123.123

Login ID: ABCD
password: 1234

Click Login.

On the very right side,
you should see To Center word.

if success login, To Center icon will stay.
otherwise, no stay, it is fail to connect.

(you can add your own one in the center software)

Final,

press Record to start monitoring.

At the Center side, you should get the signal automatically.