Need Help - Multiple Location with Central Recording

Our security company wanted to setup a central monitoring room consisting of multiple locations and different type of camera, DVR and software.

We want all the CCTV to be connected with feeds from different locations (shops, restaurant, companies & residential).

Is that possible to connect all the DVR (different) into one single viewing platform and recording?

If its possible, whats are the required hardware and software?

You can use a video management software, but need to considering the compatible issue.

Hardware is a PC that can run the management software would be ok, usually when you use a paid video management software , they will recommend you PC configuration.