A monthly cell-phone service bill, for instance, contains charges for leasing radio spectrum, renting cell towers and purchasing the handset, as well as the amortization of the hardware at the cell base site, the cost of interconnections among cell sites,
A monthly cell-phone service bill, for instance, contains charges for leasing radio spectrum, renting cell towers and purchasing the handset, as well as the amortization of the hardware at the cell base site, the cost of interconnections among cell sites,
举例来说，行动电话的月租费通常包含使用无线电频谱、租用基地台和购买手机，以及摊提行动电话基地台硬体、基地台之间的连接费用、计费成本和网路系统业者的利润等。