在美国和德国利用双音频拨号方式的先进性来实现普通电话的遥控拨号,已经逐渐步入家庭。这无疑是普通电话用户的一大福音。现根据国外提供的有关资料将这一实用技术介绍如下。 目前在大多数情况下,人们拨电话时都会听到电话里有哒哒哒的拨号声,这是因为所拨的号码是通过脉冲方式告知电信局。它是直接从过去的圆盘拨号方式派生来的。脉冲拨号方式是用脉冲的个数来传递所拨号码的数字。一个脉冲代表数字1,两个脉冲代表数字2,直至10个脉冲代表数字0。进化到现代按键式电话后,其脉冲就由电路来 In the United States and Germany using the dual tone dialing advanced to achieve the ordinary telephone remote dialing, has gradually entered the home. This is undoubtedly a big blessing for ordinary phone users. Now based on the information provided by foreign countries to introduce this practical technology as follows. In the majority of cases, people now hear a dial tone on the phone when they dial the phone, because the dialed number was informed to the bureau by pulse. It is derived directly from the dialing of the past. Pulse dialing method is the number of pulses to pass the number of dialing numbers. One pulse represents the number 1, two pulses represent the number 2, and up to 10 pulses represent the number 0. Evolution to the modern push-button phone, the pulse from the circuit