Patent ID: 8861381

Claim:
An exchange system comprising: an exchange apparatus that serves a plurality of telephone terminals; and a server device that 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, wherein, 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, wherein the server device includes: a database that stores, in correspondence with the different single number of each group, identification information of the at least one telephone terminal, the identification information of the telephone terminals being different, presence information corresponding to the predetermined single number, and alternative connection destination information which represents an alternative connection destination that corresponds to a type of the presence information for a case in which connection to a top-priority destination telephone terminal is not possible, the top-priority destination telephone terminal being a connection destination among the at least one telephone terminal; and a connection destination determination processing logic that, when the server device receives the query for a connection destination for the predetermined single number from the exchange apparatus, determines an optimum connection destination on the basis of storage contents of the database, and returns information representing the optimum connection destination to the exchange apparatus, wherein the presence information includes not only the “talking” or “out of range” of the telephone terminal of the connection destination but also activity of a user of the telephone terminal of the connection destination, wherein the activity of the user includes any activity registered by the user.