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Transmitter for key telephone system

阅读:684发布:2023-03-24

专利汇可以提供Transmitter for key telephone system专利检索,专利查询,专利分析的服务。并且PURPOSE:To supply a transmitter for key telephone systems which promotes the effective use of radio channels, by storing plural telephone lines by one radio channel. CONSTITUTION:Sound signals are given to terminal 131 of a transmitter for key telephone systems and are sampled in A-D converter 20 and are converted to a digital code. Since switch 23 is switched to the upper side and the lower side every one sampling, six odd-numbered samples and even-numbered samples are stored in shift registers 24 to 29 and shift registere 30 to 35 respectively. Consequently, odd- number burst signals and even-number burst signals are transmitted from terminal 38 and terminal 39 respectively. Thinning-out period detection circuit 3 reads out burst constituting control signals by the control pulse code from another slave machine, and closes one of AND gates 43 and 44 through OR gates 45 and 46 of burst gate 2, thereby suppressing odd-number or even-number burst signals.,下面是Transmitter for key telephone system专利的具体信息内容。

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