Abstract: An exchange apparatus serves a plurality of telephone terminals and a server device is connected to the exchange apparatus via an exchange network and that, in a case in which the plurality of telephone terminals are grouped, stores in association and administers, for each group, a different single number and identification information of the at least one telephone terminal belonging to the group. When a call is originated with a predetermined single number from an originating side telephone terminal, the exchange apparatus performs a query to the server device for a connection destination corresponding to the predetermined single number, and implements a call connection between a telephone terminal of a connection destination, which is a result from the server device in response to the query, and the originating side telephone terminal.

Abstract: An exchange apparatus serves a plurality of telephone terminals and a server device is connected to the exchange apparatus via an exchange network and that, in a case in which the plurality of telephone terminals are grouped, stores in association and administers, for each group, a different single number and identification information of the at least one telephone terminal belonging to the group. When a call is originated with a predetermined single number from an originating side telephone terminal, the exchange apparatus performs a query to the server device for a connection destination corresponding to the predetermined single number, and implements a call connection between a telephone terminal of a connection destination, which is a result from the server device in response to the query, and the originating side telephone terminal.