〈英〉(电话的)振铃声
Now a stored program control switch is simulated on a cheap micro-computer. All hardware movements of it are realized by software simulation, and calling processing can be carried out. It has various functions such as signal tone, ringing and talking etc.
在廉价的微机上实现程控数字交换机的模拟,该模拟交换机所有硬件动作均由软件模拟完成,它能进行呼叫处理,并有各种信号音、振铃和通话等各种功能。
A Method of Detection Recognition of Tone Ringing
信号音及铃流的一种检测与识别方法
The test methods for the technical specifications of ringing and tone for automatic telephone switching network
GB/T5443-1985电话自动交换网铃流和信号音技术指标测试方法
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