Subject: ATM-04 Available

From: "J. G. Dudley (444/4358)" <[email-masked]>
Date: Tue, 21 May 96 09:14:43 EDT

A new AP draft of ATM-04, HPR Extensions for ATM Networks, is
now available in the /AIW/APPN/HPR directory of the AIW document
repository.  There are 3 files on the repository:  a ps version, a
zipped ps version, and a self-extracting (exe) zipped version.
There will be a 2 week review period.

The principal changes from ATM-03 include the following:

1. LDLC has been changed as agreed at AIW10.  LDLC encapsulates outgoing
   packets in an LLC1 header to allow SAP multiplexing.  In addition,
   products may now support an LLC2 option set to enable ATM/frame relay
   service interworking.  These changes affected many sections
   throughout the document.  See, in particular, sections 1.2.3, 1.2.4,
   1.2.5, 1.3, 2.1, 2.1.1, 2.3, 2.4 (and all subsections), 2.11.3,
   Appendix A, and section D.2.2.2 of Appendix D.

2. At AIW10, Matthew Finlayson (DCL) raised a concern about requiring
   the use of predefined TG numbers for parallel regular TGs.  I have
   clarified why and under what circumstances predefined TG numbers are
   required in section 2.7.1.  I have also included regular TG races
   (simultaneous SVC activation from both ATM endstations) in
   section 2.11.

Many thanks to Ray Bird and Jim Cobban for their work which is reflected
in this version.

Regards,
Gary Dudley