ISO IEC 2593 pdf download Information technology — Telecommunications and information exchange between systems — 34-pole DTE/DCE interface connector mateability dimensions and contact number assignments 1 Scope This lnternational Standard specifies the 34-pole connector and the assignment of contactnumbers at the interface between data terminalequipment (DTE) and data circuit-terminatingequipment(DCE)where ITU-iRecommendation v.36 or RecommendationX.21bis together with Recommendation V.10and v.11 are applicable....