论文部分内容阅读
供电交换机呼叫市话(自动)局是用圆盘式拨号盘进行的,每拨一位电话号码都得等待号盘回转将电话号码数据发出去后,才能拨下一位号码。这样,拨一个四位以上的电话号码将花去很长时间。本文介绍一种采用触摸方式进行拨号的拨号盘。它不仅操作轻快,准确而且具有“重叠”利用时间的功能,可以提高电话的接转速度。为确保发码准确,特设有数码显示和音响装置,能给操作人员以“准确”的直感。触摸式拨号盘工作是否可靠,其关键是看触摸键的性能如何。故下面重点说明一下触摸键,其它部份只作简要介绍。全电路主要元件采用小规模集成电路。
Power Switch Call Local (Auto) Board is done with a dial pad, dial a phone number have to wait for the dial back to the phone number data sent out, to dial a number. In this way, dialing a four-digit phone number will take a long time. This article describes a touch-based dial pad. It not only operates briskly, accurately and has the function of “overlapping” the use of time, which can increase the call transfer speed. To ensure the accuracy of the code, ad hoc digital display and audio devices, to give operators “accurate” sense of straightness. Touch pad work is reliable, the key is to see how the performance of touch keys. Therefore, the following key to explain the touch key, the other part only for a brief introduction. The main components of the entire circuit using small-scale integrated circuits.