Information technology. Document processing and related communication. User interface to telephone-based services. Voice messaging applications
Edition 1995-07-15

Ships and marine technology. Navigation and ship operations. Guidelines for onboard telephone equipment
Edition 2019-08-09

Interoperability specifications of common external power supply (EPS) for use with data-enabled mobile telephones
Edition 2018-04-13

Electricity metering - Data exchange for meter reading, tariff and load control - Data exchange using wide area networks - Public switched telephone network (PSTN) with LINK+ protocol
Edition 2002-04-18

ATTACHMENTS TO PUBLIC SWITCHED TELEPHONE NETWORK (PSTN). GENERAL TECHNICAL REQUIREMENTS FOR EQUIPMENT CONNECTED TO AN ANALOGUE SUBSCRIBER INTERFACE IN THE PSTN. PART 1: GENERAL.
Edition 1995-10-16

ATTACHMENTS TO PUBLIC SWITCHED TELEPHONE NETWORK (PSTN). GENERAL TECHNICAL REQUIREMENTS FOR EQUIPMENT CONNECTED TO AN ANALOGUE SUBSCRIBER INTERFACE IN THE PSTN. PART 2: ATTACHEMENT REQUIREMENTS TO THE SPANISH PSTN.
Edition 1995-10-16

ATTACHMENTS TO PUBLIC SWITCHED TELEPHONE NETWORK (PSTN). GENERAL TECHNICAL REQUIREMENTS FOR EQUIPMENT CONNECTED TO AND ANALOGUE SUBSCRIBER INTERFACE IN THE PSTN. PART 2: ATTACHMENT REQUIREMENTS TO THE SPANISH PSTN.
Edition 1998-04-17

Detail specification for pair metallic cables used for telephone access network. Cables for distribution, trunk and indoor networks.
Edition 2012-07-18

PUBLIC SWITCHED TELEPHONE NETWORK (PSTN). METHOD OF RATING TERMINAL EQUIPMENT SO THAT IT CAN BE CONNECTED IN SERIES AND/OR IN PARALLEL TO A NETWORK TERMINATION POINT (NTP).
Edition 1999-12-31

Interoperability specifications of common external power supply (EPS) for use with data-enabled mobile telephones (Endorsed by Asociación Española de Normalización in May of 2018.)
Edition 2018-05-01