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ISO 9543:1989 Information processing systems - Information exchange between systems - Synchronous transmission signal quality at DTE/DCE interfaces
standard by International Organization for Standardization, 04/01/1989
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Full Description
Prescribes quality requirements for serial data transmission at the interface between synchronous transmission Data Terminal Equipment and Data Circuit-terminating Equipment in conformance with the CCITT Recommendations V.24 (telephone networks), X.24 (data networks) as specified in DCEs of the corresponding CCITT-Recommendations. Takes into account the need to have performance cotegories of signal quality depending on the type of interchange circuits.