If your Visitor Door Entry & Access Control it is NOT remotely programmable then it is old-technology.
If your CCTV system CANNOT be managed remotely then it is old technology.
If you need software or a specific program on a laptop in order to program or access the Visitor Door Entry, Access Control or CCTV then it is over-complicated, unfriendly & old-technology.
For remote management of any of your sites (if you are not doing it yourselves), please see contact emails below.
Visitor Door Entry, Access Control: firstname.lastname@example.org