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ISO 2110/Amd1:1991 Interface connector and contact number assignments for a DTE/DCE interface for data signalling rates above 20 000 bit/s per second
Amendment by International Organization for Standardization, 09/01/1991
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Includes specific changes to ISO 2110:1989 Clauses 1 and 2, and Table 1. Adds the new Annex B. Annex B is for information only.