Broadband Integrated Services Digital Network (B-ISDN);Synchronous Digital Hierarchy (SDH) based user network access;Physical layer User Network Interfaces (UNI) for 155 520 kbit/s and 622 080 kbit/s; Asynchronous Transfer Mode (ATM) B-ISDN applications (Endorsed by Asociación Española de Normalización in June of 2022.)
Broadband Integrated Services Digital Network (B-ISDN);Synchronous Digital Hierarchy (SDH) based user network access;Physical layer User Network Interfaces (UNI) for 155 520 kbit/s and 622 080 kbit/s; Asynchronous Transfer Mode (ATM) B-ISDN applications (Endorsed by Asociación Española de Normalización in June of 2022.)
