METHOD FOR CONFIRMING SOFTWARE UPGRADE INFORMATION OF AN IP-PHONE, ESPECIALLY WITH REGARDS TO CONTINUOUSLY DISPLAYING SOFTWARE UPGRADE INFORMATION ON AN LCD WINDOW OF THE IP-PHONE WHEN A SOFTWARE VERSION IS UPGRADED

摘要

PURPOSE: A method for confirming software upgrade information of an IP-phone is provided to notify upgrade information of a software version registered in a call server to each IP-phone, and to display upgraded software information on an LCD window, so that a user can confirm newly upgraded software information through the IP phone. CONSTITUTION: If an IP-phone software version is upgraded(S21), a call server makes up a software upgrade informing message(S22), and transmits the software upgrade informing message to each IP-phone registered in the call server(S23). Each IP-phone displays the software upgrade informing message on each LCD window(S24). Users of each IP-phone upgrades an IP-phone software version by applying newly upgraded software(S25).