• 呼叫应答时,LEC(本地电话公司)使用规则重新发送呼叫

    Rules that a LEC (Local Exchange Carrier) employs to redirect a call that encounters a Busy or No Answer.

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  • 应答呼叫完成(CCNR)一种主叫用户提供ISDN补充业务

    Completion of Calls on No Reply (CCNR) is an ISDN supplementary service offered to the calling user.

    youdao

  • 应答呼叫完成(CCNR)一种主叫用户提供ISDN补充业务

    Completion of Calls on No Reply (CCNR) is an ISDN supplementary service offered to the calling user.

    youdao

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