INFORMATION TRANSFER SYSTEM

PURPOSE:To improve the efficiency of channel lines, by eliminating the need for the split use of the channel lines at each type of telephone set, through the change in combination of a multiplex frequency signal of a contact code or transmission code corresponding to outgoing telephone set type information. CONSTITUTION:A connection controller CPA of an outgoing exchanger A transfers telephone set type information and dial number information corresponding to outgoing subscribers SUB to an MF signal transmitter SNDA to start an incoming trunk ICTB of an exchanger B. In the exchanger B, through the control of a connection controller CPB, the ICTB and the MF signal receiver REGB are connected and an MF signal reception preparation completion signal is transmitted to the exchanger A. When the exchanger A receives the MF signal reception preparation completion signal, the exchanger A transmits the contact and transmission code changed with the combination of multiplex frequency signals corresponding to the dial number and outgoing telephone set type stored in the SNDA to the exchanger B via an outgoing trunk OGTA.