美国卫星公司向政府机构提供的国内卫星通信业务有:高速数据、传真和数字保密电话。这种国内卫星通信业务的优点如下: △高质量的宽带数据传输,波特误差概率为10~(-7)或更小; △安装简单,操作方便; △由于相互直接联接,保密传输更为简单; The domestic satellite communications services provided by U.S. satellite companies to government agencies include high-speed data, fax and digital security phones. The advantages of this kind of domestic satellite communication service are as follows: △ High-quality broadband data transmission, the probability of Porter error is 10 ~ (-7) or less; △ Easy to install, easy to operate; △ Due to the mutual direct connection, simple;