User's Manual

14 Chapter1
Overview
Introduction
Introduction
The HDLC.FRAME Protocol is part of the Advanced Communications
Controller (ACC) family of products This manual provides configuration
information that is specific to that protocol.
There are differences in the use of the HDLC.FRAME protocol, which
depend on t he type of physical interface in use. The physical interface
types fall into one of two categories. These are “E1/T1” and all other
types (for example “RS232” or”X.21”). Throughout this document these
categories are referred to as E1/T1 or non-E1/T1.
Product Features
The HDLC.FRAME protocol a dds HDLC framing (including the
checksum) to outgoing messages and strips the HDLC framing
(including the checksum) from incoming messages. The HDLC.FRAME
protocol performs frame checksum processing.
The HDLC.FRAME protocol is fully defined in the following ISO
standards document:
ISO 3309 HDLC Procedures - Frame Structure
Fifth edition 1993-12-15
Reference number ISO/IEC 3309:1993(E)