1991ISO 2110:1989/Amd 1:1991 Information technology - Data communication - 25-pole DTE/DCE interface connector and contact number assignments - Amendment 1
1989ISO 2110:1989 Information technology; data communication; 25-pole DTE/DCE interface connector and contact number assignments
1980ISO 2110:1980 Data communication — 25- pin DTE/DCE interface connector and pin assignments
1972ISO 2110:1972 Title missing - Legacy paper document