“ISDN-oriented Modular Interface”的意思、由来-开放百科全书

词条

ISDN-oriented Modular Interface

释义

References

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

{{Cite book| year=1991 | title=ICs for Communications, IOM–2 Internal Reference Guide | publisher=Siemens AG}}
{{Cite book| year=1994 | title=ICs for Communications, ISDN Subscriber Access Controller for Terminals, ISAC–STE, PSB2186 User’s Manual | publisher=Siemens AG}}
{{Cite book| last=Georg | first=Otfried | year=2000 | title=Telekommunikationstechnik | publisher=Springer | isbn= 978-3-540-66845-9 | id= {{ISBN|3-540-66845-4}} }} (in German, p. 278ff give an overview and some application examples)

1 : Integrated Services Digital Network

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