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

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

Concepts for the arrangement in connection with functional and constructional units
Edition 1979-10

Interfaces for DVB-IRD; German version EN 50201:2001
Edition 2002-05

Fire detection and fire alarm systems - Part 21: Alarm transmission and fault warning routing equipment; German version EN 54-21:2006
Edition 2006-08

Public Schwitched Telephone Network (PSTN) - Protocol over the local loop for display and related services - Terminal Equipment requirements - Part 2: on-line data transmission
Edition 2001-09-01

Guide for the development of a business model for home related services - Part 3: Interfaces
Edition 2012-12