DIGITAL TERMINALS AND ACCESS (DTA); ATTACHMENT REQUIREMENTS FOR DATA TERMINAL EQUIPMENT (DTE) TO CONNECT TO PACKET SWITCHED PUBLIC DATA NETWORKS (PSPDNS) FOR CCITT RECOMMENDATION X.25 INTERFACES AT DATA SIGNALLING RATES UP TO 1,920 KBIT/S UTILIZING INTERFACES DERIVED FROM CCITT RECOMMENDATIONS X.21 AND X.21 BIS
National Standards Authority of Ireland