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INTEGRATED SERVICES DIGITAL NETWORK (ISDN); PRIMARY RATE USER-NETWORK INTERFACE; LAYER 1 SPECIFICATION AND TEST PRINCIPLES. Original standard UNE-ETS 300011-1999 in PDF full version. Additional info + preview on request

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Amendment 2 - INTEGRATED SERVICES DIGITAL NETWORK (ISDN) - BASIC USER-NETWORK INTERFACE - LAYER 1 SPECIFICATION AND TEST PRINCIPLES. Original standard UNE-ETS 300012-1999 A2-1999 in PDF full version. Additional info + preview on request

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INTEGRATED SERVICES DIGITAL NETWORK (ISDN) - BASIC USER-NETWORK INTERFACE - LAYER 1 SPECIFICATION AND TEST PRINCIPLES. Original standard UNE-ETS 300012-1999 in PDF full version. Additional info + preview on request

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INTEGRATED SERVICES DIGITAL NETWORK (ISDN); USER-NETWORK INTERFACE LAYER 3. SPECIFICATIONS FOR BASIC CALL CONTROL - SPECIFICATION DESCRIPTION LANGUAGE (SDL) DIAGRAMS. Original standard UNE-ETS 300102-2-1999 in PDF full version. Additional info + preview on request

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Power transformers - Part 7- Loading guide for mineral-oil-immersed power transformers. Original standard UNE-IEC 60076-7-2025 in PDF full version. Additional info + preview on request

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Quality management. Guidance for quality tools and their application. Original standard UNE-ISO 10009-2024 in PDF full version. Additional info + preview on request

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