ETSI EN 300 267-2 English Printed Edition English PDF Integrated Services Digital Network (ISDN); Telephony 7 kHz, videotelephony, audiographic conference and videoconference teleservices; Digital Subscriber Signalling System No. one (DSS1) protocol; Part 2: Protocol Implementation Conformance Statement (PICS) proforma specification

standard published 05/01/2000 by European Telecommunications Standards Institute