| 摘要 |
PROBLEM TO BE SOLVED: To reduce the power consumption more than that of a conventional telephone set and to report it to a caller through display that speech is not available because no dead channel is available when a destination is nit busy at calling but there is no dead channel for speech available. SOLUTION: A display means 7 displays a message to report absence of dead channel to a speech cannel for a radio channel at calling. Upon the receipt of a control signal at calling, a control means 6 allows the display means 7 to display a message reporting no dead channel of a speech channel of the radio channels and controls the display means 7 to delete the display of the message when a hook key is hooked on. |
