How to access router web page of "Wifi Hub" model PVR65B? ( the cylindrical white one )

Tried the gateway address from a direct wired RJ-45 network link ( 192.168.1.254 ), but I get nothing. I don't remember how to access it, I know I did the day it was installed, I asked the technician, but it's been almost 2 months and I forgot the address, what is the address if the IP doesn't work?

Thanks!