House Rewiring - Telephone Line

Max786

Hi All, 
    I need some advice please.  I am getting the whole house rewired/plastered and at the same time, i would like to put in a telephone cable in certain room in the house.  I am bit confused on what i should buy and install. I reviewed forums and they seem a bit old, so could be installing something not required or legacy.
I have a master socket downstairs in the landing and i had legacy sockets upstairs in my daughters bedroom - a cable leading from the master socket to the socket upstairs.  This was where we had the family PC/router and house telephone.  I want to modify the location of these devices to as follows:
Keep the master socket in the landing downstairs and also keep the router upstairs in the kids bedroom , but:
1) Have a telephone socket for the family phone in the master bedroom and kitchen
2) Do i need to lay a telephone socket in the kids bedroom, along with a telephone line or will the new house electric wiring suffice, with wireless plugs. - wiring will be hidden
3) I am bit confused with 4-core or 8-core telephone cable , what is the difference - 
           https://www.screwfix.com/p/nexans-4-core-telephone-cable-50m-white/190fk
           https://www.screwfix.com/p/nexans-8-core-telephone-cable-50m-white/396fk
4)  Is there any recommendation on what telephone socket i should go for, i want to make it future proof also, especially with more and more devices becoming wireless now
5) Is there also any recommendation for network devices for WIFI around the whole house.

As you can see i am bit confused and out of touch with what is available and possible these days on the market.  So any advice will be appreciated.

Thanks

renegadefm

I would keep the router at the main socket for best speed results and install ethernet cabling all around the house with sockets so that you can plug any computer device into a socket a bit like a phone socket. But thats just me, you see these set ups in offices etc, its something I always wanted but don't want to dig the plaster off yet. It brings faster speeds than wifi to each room, distributing equal speeds in each room, especially if you got thick walls. While your about it put a phone line in there for phone sockets in the rooms you want. A typical phone socket only requires 2 cables,  so a four core phone line is fine. 

renegadefm

Typical ethernet socket

https://cpc.farnell.com/kauden/sx7051m-pg/faceplate-1-gang-cat-5e-white/dp/CS31103?mckv=sRQRSBeQy_dm|pcrid|224690506549|kword||match||plid||slid||product|CS31103|pgrid|50784124721|ptaid|pla-667323081530|&CMP=KNC-GUK-CPC-SHOPPING&gclid=Cj0KCQiAkKnyBRDwARIsALtxe7iz2JgbilWhKAjH_i_Z_4xUlskYtQ1Ru77Cf9YxHtYj5e2LezwOvI8aAhFYEALw_wcB

renegadefm

Also its worth spending a bit extra on a decent router with at least 4 ethernet ports to supply at least 4 rooms. 

Ian011

If you have a major replastering job, take the opportunity to install small plastic piping in various places for telephone and ethernet cabling. Don't just bury the cables directly in the plaster. In fact, why not put several pipes alongside each other, ready for whatever might come in the future. One day fibre will become so cheap that people will run that from room to room. Do take minimum bend radius figures into account at all joints. Go for large gentle curves. 

renegadefm

The router would work best in the landing from the main socket, not in the kids bedroom,  as that means the router is running from an extention. This greatly affects download speeds. 
As Ian011 rightly said put in plenty of trunking so you can thread cables in for the future and also makes this installation a breeze. 
But if your going to run potentially computers or gaming devices such as an xbox or playstation, or even streaming tvs. I would definetly install ethernet wires from the router to each required room rather than rely on wifi. 
I know someone in a flat and their router is in the downstairs landing, but because of concrete ceilings they have zero wifi in the upper levels. Even Sky couldn't cure the problem due to not being allowed to install ethernet cabling to the trouble spots. But if you put ethernet sockets in the rooms your going to use the broadband the most its far better than relying on wifi. 
Moving the router to the main socket is already a 2 minute fix towards faster speeds.