ACC HDLC-NRM (SDLC) User's Guide

Overview
Product Features
Chapter 114
Product Features
The HDLC-NRM (SDLC) protocols are polled protocols, supporting both
a primary and secondary station. Multiple stations may be defined on a
line. However, stations on a line must be either all primary or all
secondary.
The HDLC protocols are fully defined in three standards documents
published by the International Standards Organization (ISO). These
standards are ISO 3309, 7809 and 4335, full references to which are
given at the end of this chapter.
The HDLC Normal Response Mode protocols product implements both
the primary and secondary station procedures for the Unbalanced
operation Normal response mode class, as defined in ISO 7809.
The frame types supported are those for the basic repertoire, as defined
in ISO 7809 clause 3.2.2.1. These frames are as follows:
Three optional extended features are provided in addition to the defined
standard features. These features are:
• Remote Power Control
• Broadcast Facility
• SDLC Loop Mode Primary
The first two features are more fully described in Chapter 4, Protocol
Specific Configuration, while the third feature is covered in Appendix B,
SDLC Loop Mode Option,.
Commands Responses
II
RR RR
RNR RNR
SNRM UA
DISC DM
FRMR