Method and apparatus for providing company call service in wireless and wired integrated network

PURPOSE: An apparatus for providing company call service in a wireless and wired integrated network, and a method thereof are provided to reduce communication fee by dividing private call from an official call. CONSTITUTION: A call connection request from an employee terminal to a client terminal is received(S401). The employee's communication request is processed through a packet network(S403). The client's phone number is transmitted to the employee's terminal through the packet network(S407). An address book database extracts a wired phone number which is assigned to the employee(S411). The client's terminal is called using the extracted wired phone number as a call originating number, and the call is connected to the employee's terminal(S417).