Abstract: An IP telephone system equipped with a plurality of telephone terminals and a file server, wherein the file server comprises notification unit notifies an occurrence of update data of the software to the telephone terminals and transfer unit transfers the update data to a telephone terminal of a request source in response to a request from the update data from the telephone terminal, and the telephone terminal comprises reporting unit reports a fact of such to user when the occurrence of the update data is notified from the file server, a input unit used for inputting the update timing of the software by the user reported, request unit requests a transfer of the update data to the file server at the timing, and software update unit switches old software to new software based on the update data transferred from the file server in response to the request.

Abstract: An IP telephone system equipped with a plurality of telephone terminals and a file server, wherein the file server comprises notification unit notifies an occurrence of update data of the software to the telephone terminals and transfer unit transfers the update data to a telephone terminal of a request source in response to a request from the update data from the telephone terminal, and the telephone terminal comprises reporting unit reports a fact of such to user when the occurrence of the update data is notified from the file server, a input unit used for inputting the update timing of the software by the user reported, request unit requests a transfer of the update data to the file server at the timing, and software update unit switches old software to new software based on the update data transferred from the file server in response to the request.

Abstract: An IP telephone system having a plurality of terminals, comprising storage means storing relationships between terminal ID and user ID for each of the plurality of terminals, server performing call processing control related to each terminal logged in and registered, storage means storing upper limit numbers of the respective terminals possible to log in for each user in accordance with the user ID, comparison means comparing and collating between the number of the logged in and registered terminals and the upper limit number corresponding to the user ID on the basis of the user ID, when the user ID is input in the terminal, and controller allowing terminal with the user ID input thereto to be logged in and registered, when the number of the logged in and registered terminal is not more than the upper limit number as the result of comparison and collation from the comparison means.