| 摘要 |
PURPOSE:To automatically ends a handfree telephone call. CONSTITUTION:The automobile telephone device 1 detects a specific code (tone kind and busy state) by a CPU 8, provided in the handset 4, from a radio equipment 2 through a series signal line SL 1 when an opposite station enters an on-hook state earlier. On the basis of the detected specific code, the automobile telephone device 1 is placed in a wait state. |
