Product Features

This software provides Level 2 interface operation within the BAC class of procedures recommended by ITU-T (CCITT). As described in the standards cited below, BAC (Balanced operation Asynchronous balanced mode Class) applies to point-to-point configurations involving two combined stations on a logical data link. Unlike primary/secondary stations, these may have an equal (balanced) stake in the responsibility for data link management.




	NOTE: For Level 2 interface operation within the unbalanced class of procedures (UNC, for Unbalanced operation Normal response mode Class), Hewlett-Packard provides a separate ACC accessory product: The HDLC NRM Protocol product. (The HDLC NRM Protocol accessory includes an SDLC loop mode option.)

The LAP-B (ABM) protocol is defined in ISO standards 3309, 4335, and 6256 as follows:

Standard 3309 pertaining to 'Data communications - High level data link control procedures - Frame structure';
Standard 4335 pertaining to 'Data communications - High level data link control procedures - Elements of procedures', and
Standard 6256 pertaining to 'Data communications - HDLC balanced class of procedures'.

All were drawn up by ISO/TC 97, Computers and information processing.

Product Features

Technical documentation

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