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自从去年7月,上海市电话局推出“来电显示”业务后,既受到用户的欢迎。据了解,这项业务每线仅收用户月租费10元。只需在普通的电话机上加装主叫号码显示器(使用带有显示器的电
Since July last year, Shanghai Telephone Bureau introduced “caller ID ” business, both by the user’s welcome. It is understood that this business only received monthly fee of 10 yuan per user. Simply add a caller ID display to an ordinary phone (use the power with the display