The following file contains detail information about Home Phone Wiring Diagram using Cat5 Cable. the Phone systems are different than electrical wiring systems in the fact that the electrical current for phones comes from the phone company. Phones use their own power. There are two methods of running a phone line. The older method is called a “daisy chain” and the newer method is called a “hub”.
A daisy chain wiring method starts at the box outside installed by the phone company. The hub method has a line that runs from the box outside to a junction box that feeds each phone jack with a separate Cat5 cable.
Get more information regarding the Home Phone Wiring Diagram using Cat5 Cable here (source: scribd.com)