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ISDN-oriented Modular Interface (IOM) is a system architecture and its bus for communication between various VLSI ICs for the lower layers (ref. OSI model) of ISDN. It was developed by Siemens (today: Infineon), current revision is IOM-2. Its purpose is to enable modularity. Second sources are AMD, Alcatel, Plessey. IOM-2 is a 4-wire serial, full-duplex link. 2 operation modes are available: line card mode and terminal mode; which differ only in number and purpose of the channels. Signals are: * DCL (data clock, 16 kHz * N, where N = number of channels) * FSC (frame sync, 8 kHz) * DU (data upstream) * DD (data downstream) ==References== * * * (in German, p. 278ff give an overview and some application examples) 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「ISDN-oriented Modular Interface」の詳細全文を読む スポンサード リンク
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