My father designed and built a large house about 10 years ago. Back then, internet was not 'popular' and so when it came to communication facility, he chose to install a PABX and ran all the wires inside wall, but didn't really use it.
Last year, we installed internet and wifi. The problem is that wifi can only cover a limited area, not the whole house. So right now, we have the telephone line from ISP, the wireless modem router, a PABX as pictured in the central room, and RJ45 outlet connections in every other room.
To get internet in every room, can I simply connect the wireless modem router to the PABX system - router outlet is RJ45 while PABX inlet is RJ11, should there be a problem?
Or do I have to connect the ISP telephone line to PABX system, then get a modem for each room? Connecting ISP line to PABX is fine (both RJ11) but outlet connection in each room is RJ45 while modem requires RJ11 inlet.
Or should I just get a wifi repeater, or a super strong wireless router? We want a setup that minimizes additional physical wirings, except from those wires already running inside the wall.