Patent Number: 6,307,928

Title: Call-back controllable exchange and call-back control method in exchange

Abstract: The present invention relates to a call-back controllable exchange and a call-back control method in the exchange. The call-back controllable exchange, containing a plurality of subscriber terminals of the invention, is basically comprised of a call controller and a call-back controller. Receiving a call setting request signal transmitted from a calling terminal to a called terminal, the call controller controls to set a call from the calling terminal to the called terminal on the basis of an identifier of the calling terminal and an identifier of the called terminal that are contained in the call setting request signal. On the other hand, the call-back controller transmits a release request signal to the calling terminal to disconnect the call set by the call controller, and then on the basis of the foregoing identifiers, transmits to the calling terminal a reverse call setting request signal to set a reverse direction call to the foregoing call. Thereby, the exchange of the invention is able to execute the call-back control that automatically sets the called party as the sender so as to charge the called party for the communication rate, without positioning an operator in a switched network or organizing a special system as an intelligent network.

Inventors: Yamasaki; Yasukiyo (Kawasaki, JP)

Assignee: Fujitsu Limited

International Classification: H04Q 11/04 (20060101); H04M 3/42 (20060101); H04L 12/56 (20060101); H04M 003/42 ()

Expiration Date: 10/23/2018