Hi Geoff and welcome to the forum.
One usually call these cams OEM no-names, but this is more like anonymous I need much more information than this.
-is it a camera with PTZ?
-do the camera support ONVIF standard?
-when you connect do it from the browser is that the configuration of the camera or do you also have the video?
-is it a high resolution camera using codec h.264?
-if you have it on Internet send a link to that site.
We start the easy way.
1.if the camera support the onvif standard add the camera in NCS using the tab ONVIF. Enter parameters. If the cam support onvif you should now have several choices.
2. if that do not work these no-name cameras usually work with a template for Foscam F186xx/98xx. Test to add the camera using one of these templates.
3. it can also work with a model from Tenvis.
If non of the above works then I need access to the camera so I can try to figure out the URL on how to communicate with the camera. That URL will the be entered using the tab Custom URL. That will give video and audio, but no PTZ if the cam have that.