ACC HDLC-NRM (SDLC) User's Guide

Chapter 3 31

Using HDLC-NRM (SDLC) Protocols

Application Message Headers

The HDLC-NRM (SDLC) protocol does not use application message

headers. Both transmitted and received messages contain only the

information field of information f rames sent across th e link. The protocol

adds communications header and trailer to transmitted messages, and

removes the s ame from received messages.