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

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

ATTACHMENTS TO THE PUBLIC SWITCHED TELEPHONE NETWORK (PSTN). CATEGORY II ATTACHMENT REQUIREMENTS FOR 1200 BITS PER SECOND DUPLEX MODEMS STANDARDIZED FOR USE ON THE PSTN.
Edition 1993-07-15

ATTACHMENTS TO THE PUBLIC SWITCHED TELEPHONE NETWORK (PSTN). CATEGORY II ATTACHMENT REQUIREMENTS FOR 2400 BITS PER SECOND DUPLEX MODEMS STANDARDISED FOR USE ON THE PSTN.
Edition 1993-07-13

ATTACHMENTS TO THE PUBLIC SWITCHED TELEPHONE NETWORK (PSTN). CATEGORY II ATTACHMENT REQUIREMENTS FOR 1200 BITS PER SECOND HALF DUPLEX AND 1 200/75 BITS PER SECOND ASYMMETRICAL DUPLEX MODEMS STANDARDISED FOR USE ON THE PSTN.
Edition 1993-07-13

RADIO EQUIPMENT AND SYSTEMS (RES). TECHNICAL CHARACTERISTICS, TEST CONDITIONS AND METHOD OF MEASUREMENT FOR RADIO ASPECTS OF CORDLESS TELEPHONES CT1.
Edition 1999-10-25

TERMINAL EQUIPMENT (TE). ATTACHMENT REQUIREMENTS FOR PAN-EUROPEAN APPRoval for connection to the analogue Public Switched Telephone Networks (PSTNs) of TE (excluding TE supporting the voice telephony service) in which network addressing, if provided, is by means of Dual Tone Multi Frequency (DTMF) singalling.
Edition 1998-09-29

PUBLIC SWITCHED TELEPHONE NETWORK (PSTN). ATTACHMENT REQUIREMENTS FOR A TERMINAL EQUIPMENT INCORPORATING AN ANALOGUE HANDSET FUNCTION CAPABLE OF SUPPORTING THE JUSTIFIED CASE SERVICE WHEN CONNECTED TO THE ANALOGUE INTERFACE OF THE PSTN IN EUROPE.
Edition 1999-01-19