ISO IEC 2593 pdf download – Information technology — Telecommunications and information exchange between systems — 34-pole DTE/DCE interface connector...
ISO IEC 13865 pdf download – Information technology — Telecommunications and information exchange between systems — Private Integrated Services Network...
ISO IEC 15050 pdf download – Information technology — Telecommunications and information exchange between systems — Private Integrated Services Network...
ISO IEC 15052 pdf download – Information technology — Telecommunications and information exchange between systems — Private Integrated Services Network...