Integrated Services Digital Network (ISDN); 3,1 kHz telephony teleservice; end-to-end compatibility requirements for telephony terminals; english version ETS 300082:1992

This specification outlines the essential requirements for the compatibility between terminal equipment and the user interfaces provided by 3.1 kHz telephone communication services within the framework of Integrated Services Digital Network systems. It defines the technical criteria necessary to ensure that various terminal devices can effectively interconnect and operate reliably with the designated network services. The document addresses critical aspects related to signal transmission, impedance matching, and operational procedures to facilitate seamless voice communication. By establishing these parameters, the standard supports the interoperability of different hardware manufactured by various vendors, allowing for a unified and consistent user experience across diverse network environments. It serves as a technical reference for manufacturers designing terminals and for network operators managing service deployment. The scope covers the interface characteristics required for successful connection between the user equipment and the network access point, ensuring that voice quality and connection stability are maintained according to established engineering practices.