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ISDN-oriented Modular Interface
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ISDN-oriented Modular Interface : ウィキペディア英語版
ISDN-oriented Modular Interface

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)
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