| 摘要 |
PURPOSE: A method for supplying a single call service is provided to enable mutual calls without pressing individual telephone numbers between plural subscribers, and not to occupy network resources while a telephone conversation does not be made, thereby enabling a long-term call without paying for call charges. CONSTITUTION: In an initial standby state(501), a session management system receives a call connection request through a mobile communication system(503). The system receives a call connection(505), and delivers a silent sound or a prepared voice(507). The system generates a new set, and includes a subscriber A in the set(509). The system retrieves a subscriber list with a telephone number dialed by the subscriber A, and attempts connecting a call for each subscriber(511). The system drives a timer(513). If a subscriber B is connected with the call(517), the system adds the subscriber B in the set(519), and sets a call connection to enable mutual calls among all subscribers within the set(521). |
