Thanks - address is 192.168.1.1. I think I did what wittaj said last time I set this up and just forgot!
OK, thanks.
Log into that IP and set the router's DHCP pool to be from 192.168.1.2 to 192.168.1.199.
The router will then assign IP's to devices that are DHCP like smartphones, smart TV, tablets, etc. but will not assign an IP above 192.168.1.199.
Now you can use 192.168.1.200 to 192.168.1.254 to use for static IP's for IP cameras, PC's, NVR's, printers, etc. as you see fit.