北欧移动电话系统
NMT Nordic Mobile Telephone system
移动电话交换机
MTUmobile telephone exchange
移动电话交换站
MTSO Mobile telephone switching office
移动电话设备
mobile telephone equipment
移动电话双向收费
two-way charges for cellular phones
窄带高级移动电话服务
NAMPS Narrowband Advanced Mobile Phone Service