PURPOSE: To respond to an incoming and transferred call without releasing the incoming transfer service by connecting back the call, which is connected to a transfer destination terminal by the incoming transfer service, to a transfer source terminal on a certain condition by a central controller.

CONSTITUTION: This system consists of an exchange 4 to which an originating subscriber terminal 1, a transfer source terminal 2 subscribed for the incoming transfer service, and a transfer destination terminal 3 are connected, a central controller 5 which controls connection of the exchange 4, and a storage part 6 where the telephone number or the like of the transfer source terminal 2 is stored. The central controller 5 connects back the call, which is connected to the transfer destination terminal 3 by the incoming transfer service, to the transfer source terminal 2 on a certain condition, for example, on the condition of depression of a special number or function key. That is, the call from an originating subscriber A is connected back to the transfer source terminal 2 whose telephone number is stored in the storage part 6. At this time, it is preferable that the ringing pattern is made different from the normal pattern for the purpose of draw a distinction from the normal incoming.