narrow band data line 中文意思是什麼
narrow band data line
解釋
窄帶數據線路-
Media gatewaytdmatm integrated access equipment is the main way of narrow band and data private line access. users may access fixed telephone network and dial - up access braodband man through twisted cable ; users may access broadband data network through adsl or ddn, or fr, etc ; mobile comminication users may access 2g or 3g mobile communication network through base station equipment and wireless gateway
媒體網關tdmatm綜合接入設備主要是窄帶和數據專線接入方式,用戶通過雙絞線可以接入固定電話網以及撥號接入寬帶ip城域網;用戶通過adsl或ddn 、 fr等可接入寬帶基礎數據網;移動通信用戶通過基站設備和無線網關可接入第二代或第三代移動通信網。
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