| 摘要 |
PURPOSE:To make talking from the same automobile telephone terminal even when an automobile enters other radio communication service support area from one radio communication service support area. CONSTITUTION:The telephone set is provided with a control means 2, which stores a radio communication service support area sectional map of the automobile telephone set, detects a radio communication service support area section in which talking is available at a position detected by its own automobile position detector and sets and revises automatically the communication specification of the automobile telephone terminal equipment 3 into the communication specification in matching with the transmission reception specification of the detected radio communication service support area section. |
