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The S interface or S reference point, also known as S0, is a User–network interface reference point for basic rate access in an Integrated Services Digital Network (ISDN) environment, that * is characterized by a Four-wire circuit, 144 kbit/s (2B+D) user rate, * serves as a universal interface between ISDN terminals or terminal adapters and the network channel termination, * allows a variety of terminal types and subscriber networks, such as PBXs, local area networks (LANs), and controllers, to be connected to the network, and * operates at 4000 48 bit frames per second, ''i.e.,'' 192 kbit/s, with a user portion of 36 bits per frame, ''i.e.,'' 144 kbit/s.〔, (Entry "S interface" )〕 The S interface is electrically equivalent to the T interface, and the two are jointly referred to as the S/T interface. ==See also== * R interface * T interface * U interface 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「S interface」の詳細全文を読む スポンサード リンク
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