| 1. | Booster telephone circuit 电话增音电路 |
| 2. | Interference from one telegraph circuit to another telegraph circuit or into telephone circuits 一条电报线路或电话线路对另一条电报线路或电话线路的干扰。 |
| 3. | 1200 bits per second duplex modem standardized for use in the general switched telephone network and on point - to - point 2 - wire leased telephone circuits 在电话自动交换网和点对点二线租用电话型电路上使用的标准化的1200比特秒双工调制解调器 |
| 4. | In a telephone circuit controlled by an echo - suppressor , the inability of one or both subscribers to get through because of either excessive local circuit noise or continuous speech from one subscriber 在回波抑制器控制的电话线路中,用户的一方或双方因为过量的局部线路噪音或对方连续说话而不能通话的情况。 |
| 5. | Telephone circuit produce dtmf signal , receive ring signal and perform speech function . dtmf receiver lets it becomes binary code for mcu to read . analog circuit process speech signals between phone and gsm modem 固话电路提供产生的双音多频信号及振铃和通话功能,双音多频收号电路将dtmf信号变成二进制码,便于mcu的识别和处理。 |
| 6. | A data transmission device that connects a remote terminal to a telephone circuit and converts the signal of terminal into the signal of line or converts the signal transmitted from processing center into the signal of remote terminal 一种数传设备,它把远程终端设备连到电话线上,并把终端的信号转换成线上传输的信号,或把处理中心传送来的信号转换成远程终端设备信号。 |