| 摘要 |
PURPOSE:To implement simultaneous multiple address communication to all mobile stations resident in a service area of a base station on the occurrence of an emergency in the service area of the base station designated by a specific number from a simultaneous multiple address communication terminal equipment. CONSTITUTION:An exchange 3 sends a notice signal used to inform a state of simultaneous multiple address communication notice to a base station and upon the receipt of the notice signal, the base station sends a channel changeover command signal used to command the changeover of a simultaneous multiple address communication channel to busy mobile stations 7, and when the busy mobile stations 7 receive the channel changeover command signal, the mobile stations select the simultaneous multiple address communication channel. |
