Signal adapter

A signal adapter including wired TV signal and telephone signal from a coaxial signal cable to end users, comprising:

• a first circuit board for processing said wired TV signal and telephone signal from said coaxial signal cable;
• a first casing having a first receiving chamber at one side which receives said first circuit board, and a plurality of connectors disposed at an opposite side and respectively connected to said first circuit board for receiving signal lines from end users;
• a first cover fastened to said first casing by fastening elements and covered over said first circuit board, said first cover comprising at least one main signal input port through which said wired TV signal and telephone signal are transmitted from said coaxial cable to said first circuit board, and at least one main signal output port through which said wired TV signal and telephone signal are transmitted from said first circuit board to a next signal adapter through a second coaxial cable;
• a second circuit board for providing a telephone signal working power supply to said first circuit board;
• a second casing extended from one side of said first casing and defining a second receiving chamber which receives said second circuit board;
• and
• a second cover fastened to said second casing by fastening elements and covered over said second circuit board.