ETSI TS 100 659-3 English Printed Edition English PDF Access and Terminals (AT); Analogue access to the Public Switched Telephone Network (PSTN); Subscriber line protocol over the local loop for display (and related) services; Part 3: Data link message and parameter codings (corrections needed to EN 300 659-3 V1.3.1

standard published 11/01/2001 by European Telecommunications Standards Institute