The ITU-T Recommendation for communications formats between data terminal equipment (DTE) and an X.3 packet assembler/disassembler (PAD) in an X.25 public data network (PDN). See also DTE, PAD, PDN, X.3, and X.25.
See X.29 in Computer
An ITU standard (1977) for exchange of information between a local PAD and a remote PAD.
