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2. 发明专利

JPS6175636A Mf signal transmission system of radiotelephone set 失效
标题翻译：无线电话组MF信号传输系统
公开(公告)号：JPS6175636A
公开(公告)日：1986-04-18
申请号：JP19663384
申请日：1984-09-21
申请人： Hitachi Ltd
发明人： ISHIGAKI SHUJI
IPC分类号： H04Q1/45 , H04B7/26 , H04L27/26 , H04W84/02
摘要： PURPOSE: To transmit surely an MF signal even if a line quality is deteriorated by designing a system that the transmission of the MF signal is executed repetitively while the pushbutton of a telephone set is depressed.
CONSTITUTION: Controllers 3, 8 consist of ROM 12, 12', CPU 13, 13' and RAM 14, 14' and are provided with a tone generator 11. When the pushbutton of a telephone set 1 is depressed, an MF signal is outputted from an MF receiver 2. The CPU 13 supervises always the state of the MF receiver 2, and when the MF signal is outputted, coding is processed and the result is outputted to a data transmitter 4 as an MF data. Then whether 5 words of data transmission are executed or not is discriminated, and when YES, an alarm tone is raised from the tone generator 11 to the telephone set 1. When NO and the button operation is consecutive, the said data is continued for transmission.
COPYRIGHT: (C)1986,JPO&Japio
摘要翻译：目的：即使通过设计在按下电话机按钮时重复执行MF信号的传输的系统，即使线路质量恶化，也可以确保传输MF信号。构成：控制器3,8由ROM 12,12'，CPU 13,13'和RAM 14,14'组成，并配有音调发生器11.当按下电话机1的按钮时，输出MF信号 CPU13总是监视MF接收机2的状态，当输出MF信号时，对编码进行处理，将结果作为MF数据输出到数据发送器4。然后判断是否执行了5个字的数据传输，当“是”时，从乐音发生器11向电话机1发出报警音。当“否”和按钮操作连续时，所述数据继续传送。

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