据报载,S—1240和E—10B均已开发出虚拟交换机,可以代替用户交换机使用。究竟什么是“虚拟交换机”呢,下面作一比较说明。 这里所说的虚拟交换机,一般均附属在公网交换机上。电话局通过适当软件,授予虚拟交换机用户两个号码,一个是公网的号码,例如市话号码七位或八位;另一个是虚拟交换机的号码,一般为三到四位。虚拟交换机的用户间相互呼叫及通话,只需拨这三至四位的“虚拟交换机”号码。而凡属在虚拟交换机内通话的用户,公网是不计费用的。当虚拟交换机用户呼叫非虚拟 It is reported that S-1240 and E-10B have developed a virtual switch, you can use instead of the user switch. What exactly is a “virtual switch”, the following to make a comparison. The virtual switches mentioned here are generally attached to public network switches. The telephone office, through suitable software, grants the virtual switch user two numbers, one for the public network, for example seven or eight for the local telephone number and the other for the virtual exchange number, typically three to four digits. Virtual switch users to call each other and call, just dial the three to four “virtual switch” number. And all users who call in the virtual switch, the public network is unobtrusive. When the virtual switch user calls non-virtual