Here is a link for wiring of Cat5e cables
And here is a tutorial link
You can buy a CAT5e to BT adapter I know RS sells them, the RS order codes are
243-027 for the full master socket
243-011 for a PABX master socket
242-989 for a secondary socket.
Depending on the method of telephone distribution you use you may be able to plug an RJ11 telephone lead directly into the RJ45 socket. But the easiest way is probaly to use an adapter if you have BT plugs on the end or your leads.
The Patch panel is where you select which room has telephone etc. This is done by using a small RJ45 patch cord. You just connect one end to the telephone distribution module and the other end to a socket that then has a CAT5 cable going to it and terminating in a socket in the relavent room. (Hope this makes sense)
On the Lanshack website there is another tutorial/example on home networking.
Have a look at the Abitana website at www.abitana.com then select english and look in the support menu for examples of home network solutions.
Just a word of warning Abitana doesn't use a normal Cat5e cable their omni media cable is a slightly modified CAt5e cable, which allows it to carry the extra signals such as video and TV.
Here are some sites on Telephone wiring