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ISO 2110:1989
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ISO 2110:1989 Information technology - Data communication - 25-pole DTE/DCE interface connector and contact number assignments
standard by International Organization for Standardization, 10/01/1989
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Full Description
Specifies the 25-pin connector and assignment of connector pin number at the interface between data terminal equipment and data circuit-terminating equipment or automatic calling equipment. Applicable to voice band modems, public data network facilities, telegraph signal converters, and automatic calling equipment where CCITT Recommendations V.24 and V.28 are valid.