Performance objectives for narrow-band digital channels using geostationary satellites to serve transportable and mobile Earth stations in the 1-3 GHz range forming part of the integrated services digital network
使用地球静止卫星为构成综合业务数字网络一部分的1-3 GHz范围内的可移动和可移动地球站服务的窄带数字信道的性能目标