Open systems interconnection; protocol combinations to provide the network service; provision and support of the connectionless-mode network service; identical with ISO/IEC 8880-3:1990— 13 стр.
High-level data link control procedures, HDLC; CCITT X.25 LAPB-compatible data link procedures for data terminal equipment; identical with ISO 7776:1986 (status as of 1989)— 31 стр.
High-level data link control procedures, HDLC; address resolution/negotiation in asynchronous balanced mode over switched circuit; identical with ISO 8471:1987— 9 стр.