当前电话网络提供的电话业务，通常是一对一的交谈，或者说是一对一的交互式交流信息，电话网络只能收取主叫方一方费用。现行的电话会议和电视会议都是广播式，主席讲，与会者听或看，与会者与主席或与会者之间都不能直接交互式交流信息。当前社会活动是以群组活动、分散... The telephone services provided by the current telephone network are usually one-on-one or one-to-one interactive exchange of information, and the telephone network only charges the calling party. Current teleconferences and video conferencing are all radio broadcasts. The chairman said that attendees do not have direct, interactive exchange of information between attendees and chairpersons or attendees. The current social activities are group activities, scattered ...