| 摘要 |
PURPOSE: To shorten the activation time of call termination transfer service/ voice mail service when a power source is off and/or a subscriber is out of an area relating to a mobile object communication system. CONSTITUTION: The subscriber numbers of the in-area subscriber terminals of a base station inside the area, transfer destination telephone numbers and the presence/absence of an out-of-area flag are registered in the in-area subscriber list of an exchange A and the subscriber numbers of the in-area subscriber terminals of the base station inside the area, the transfer destination telephone numbers and the presence/absence of the out-of-area flag are registered in the in-area subscriber list of the exchange B. The presence/absence of the out-of- area flags in the respective lists are turned to NO when the in-area subscriber terminal is present within the area and changed to YES when it is out of the area. When the in-area subscriber terminal is registered to the exchange inside the other area, the subscriber number and the transfer destination telephone number are registered and added to the other in-area subscriber list, the out-of- area flag is turned to NO and the registration of the in-area subscriber terminal is eliminated from the previous in-area subscriber list. |
