本系统开发的主要目的是用户通过拨打本系统的接入号，可以在系统中与全国范围的用户进行语音聊天、使用计费电话卡、语音聊天回拨功能。- The main purpose of this system is that the user develop the system by dialing an access number, you can in the system and the user nationwide voice chat, using a billing telephone ca