ACC HDLC/LAP-B (ABM) User's Guide

12 Chapter1
Overview
Introduction
Introduction
The HDLC/LAP-B (ABM ) Protocol product is the Data Link or Level 2
layer used in conjunction with the Advanced Communications Controller
(ACC) product family. The ITU (CCITT) recommends the Link Access
Procedure Balanced (LAPB) protocol for frame-level information
transfers on balanced data links (two data stations) in X.25
packet-switching networks. This manual provides installation and
configuration information that is specific to the HDLC/LAP-B protocol
and the Asynchronous Balanced Mode (ABM) of operation.