Integrated services digital network (ISDN) - Narrowband multi-service delivery system (NMDS) - Part 7: abstract test suite (ATS) and partial protocol implementation extra information for testing (PIXIT) specification for the PSTN NMDS interface layer 3 (NTN side) (V1.1.1)
Edition 2014-03-19

Analogue PSTN terminal support interface
Edition 1999-10-15

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

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

PUBLIC SWITCHED TELEPHONE NETWORK (PSTN). CATEGORY II ATTACHMENT REQUIREMENTS FOR 9600 OR 4800 BITS PER SECOND DUPLEX MODEMS STANDARDISED FOR USE ON THE PSTN.
Edition 1993-10-07

ATTACHMENTS TO THE PUBLIC SWITCHED TELEPHONE NETWORK (PSTN). BASIC ATTACHMENT REQUIREMENTS FOR MODEMS STANDARDIZED FOR USE ON THE PSTN.
Edition 1993-07-09

ATTACHMENTS TO THE PUBLIC SWITCHED TELEPHONE NETWOR, (PSTN). CATEGORY II ATTACHMENT REQUIREMENTS FOR 300 BITS PER SECOND DUPLEX MODEMS STANDARDISED FOR USE ON THE PSTN.
Edition 1993-07-15