随着信息时代的来临,电话已成为现代家庭不可缺少的成员之一。经济和科技的发展使得电话机这个大家族越来越人丁兴旺、品种繁多。除了我们日常使用的普通电话之外,还有可以传送文字、图表的电话传真机;能够自动拨打预存的电话号码、并向对方传送语音报讯信息的报信报警电话机;而象录音电话机或无绳电话机则到处可见,所以几乎可以不把它们归类为特种类型的电话机,而看成普通类型的电话机了。象大哥大、无线集群移动电话则要把它们归属于另一个门类,即移动通信领域,它们和我们前面提到的各种电话机 With the advent of the information age, the telephone has become an indispensable member of the modern family. The economic and technological advances have made this big family of telephones more and more prosperous and diverse. In addition to the ordinary telephones that we use daily, there are telephones and fax machines that can send texts and diagrams; telephones that automatically call pre-stored telephone numbers and send telegrams to each other; and telephones like recording telephones or Cordless telephones are everywhere, so it is almost impossible to classify them as special types of telephones and as ordinary types of telephones. Like a big brother, a wireless trunked mobile phone is going to belong to another category, namely the field of mobile communications, they and we mentioned earlier all kinds of telephone