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900MHz蜂窝式移动电话系统的特点是,只要频段和制式相同,就可以将两个或两个以上的系统联接成网路,扩大其服务区域。我国规定了900MHz 频段为890—915MHz 和935—960MHz,频道间隔25kHz,双工收、发频率间隔为45MHz。根据这个规定,同时为了使我国的公用移动通信网能与其他国家和地区的 TACS 系统兼容工作,基本采用了 TACS 标准,这就为建立全国性网路创造了良好的条件。900MHz 蜂窝式移动电话系统,美国的 AMPS 制
The characteristic of 900MHz cellular mobile phone system is that as long as the frequency band and the same format, two or more systems can be connected into a network to expand its service area. China has stipulated the 900MHz frequency band is 890-915MHz and 935-960MHz, the channel interval is 25kHz, the duplex is received, the sending frequency interval is 45MHz. According to this regulation, at the same time, in order to make China’s public mobile communications network compatible with TACS systems in other countries and regions, the TACS standard is basically adopted, which creates favorable conditions for establishing a nationwide network. 900MHz cellular mobile phone system, the United States AMPS system