在许多大中城市,当 BP 机的占有量已远远超过电视机、冰箱、空调等家用电器之后,众多的 BP 机用户越来越关心腰间的这块“宠物”:你还能为我做些什么?讲 BP 机的升级换代比较困难,譬如电脑从286升到586,这是—种全方位的提高,是技术上全面发展,BP 机也是如此。目前市场上的绝大多数 BP 机,是10年前国外公司推出的低速寻呼机型,速率较低,每个频点只能容纳不超过6万用户。而美国摩托罗拉公司1993年研制开发的高速寻呼机型问世,使真正的大范围联网成为可能,这种机型每个频点可容纳近40万用户。但大多数寻 In many large and medium-sized cities, when the number of BP machines far exceeds that of household appliances such as TV sets, refrigerators and air conditioners, more and more BP users are increasingly concerned about this “pet” at their waist: you can still help me What to do? Speaking of BP machine upgrade more difficult, such as the computer rose from 586 to 586, which is - all-round improvement is technically all-round development, BP machine is also true. At present, the vast majority of BP machines on the market are low-speed pagers launched by foreign companies 10 years ago at a low speed, and each frequency point can only accommodate up to 60,000 subscribers. The United States Motorola developed in 1993, high-speed pager models come true so that a real large-scale networking possible, this model can accommodate nearly 400,000 users per frequency. But most find