waiting call system 中文意思是什麼
waiting call system
解釋
等待呼叫系統-
Today ' s familiar telephony features - - such as caller id, call waiting and 800 / 888 numbers - - are intelligent value - added services made possible by a protocol called signaling system 7 ( ss7 )
今天人們熟悉的電話功能,如主叫識別、呼叫等待、 800 / 888業務等,都是由於有了七號信令系統協議而實現的智能增值業務。
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