按键电话机
- 网络key telephone set
按键电话机-
GB/T12195-1990脉冲式按键电话机测试方法
Methods of measurement for pushbutton telephone with pulse
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GB/T12197-1990双音多频式按键电话机测试方法
Methods of measurement for pushbutton telephone with DTMF
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如果您行动不便，可能会意外地多次按动某个键GB/T9034-1988双音多频式按键电话机技术要求
If you have motion disabilities , You might accidentally press a key too many times Performance requirements of pushbutton telephone with DTMF
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为了使电力系统通信设备的呼叫装置更加使用方便工作可靠，我们研制了以按键电话机发出双音频呼叫信号进行选择接收的音频选号装置。
In order to improve the ringing method of telephone used in power systems , a type of selective calling device using audio frequency has been developed .
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你可以用按键式电话机给银行打电话，进行交易。
You can call your bank and perform a transaction using a touch-tone phone .