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)

Standard published on 31.1.1998

A guide to the application of TBR 21

Standard published on 31.1.1998

A guide to the application of TBR 21

Standard published on 31.7.1998

A guide to the application of TBR 21

Standard published on 23.2.2000

Human Factors (HF); Universal Personal Telecommunications (UPT); Specification of the minimum Man-Machine Interface (MMI) for Phase 1 UPT

Standard published on 28.2.1998

Equipment Engineering (EE); Interworking between Direct Current/Isolated (DC/I) and Direct Current/Common (DC/C) electrical power systems

Standard published on 28.2.1998

Universal Personal Telecommunication (UPT); UPT phase 2; Subscriptions, service profiles and information model

Standard published on 30.11.1997

Telecommunications security; Lawful Interception (LI); Requirements for network functions

Standard published on 31.5.1998

Telecommunications security; Lawful Interception (LI); Requirements for network functions

Standard published on 30.4.2002

Corporate Telecommunication Networks (CN); Transmission characteristics of digital Private Branch eXchanges (PBXs)

Standard published on 31.5.1998