1999/5/10

		ComOS 4.0.3c2 Interim Release Note


_______________ Introduction

The Lucent Remote Access ComOS 4.0.3c2 interim software release for the
PortMaster(R) 4 Remote Access Concentrator is now available.

This release is provided at no charge to all Lucent customers.

This release note documents updates to the modem code. All other
features are identical to those in ComOS 4.0.3.

NOTE: This interim software release is recommended only for customers who
are experiencing the problems described and are unable to wait for the
next maintenance release.

Before upgrading, thoroughly read "Upgrade Instructions."


_______________ Contents

Introduction
Bugs Fixed 
New Features 
Limitations
Troubleshooting
Upgrade Instructions
Technical Support


_______________ Bugs Fixed

* A NO EC (no error control) connection problem with Cirrus Logic
  modems is fixed.

* Performance with Cirrus Logic modems is improved.

* The number of rate renegotiations with USR/3Com and Cirrus modems has
  been reduced because ComOS now allows the client to specify spectral
  shaping.

* Rate renegotiation and retrain problems with USR/3Com and
  Rockwell HCF clients are fixed.

* Connectability with USR/3Com and Rockwell HCF modems and LT Winmodems
  is improved.

* A downward spiraling upstream rate caused by an incorrect 
  Link Access Procedure for Modems (LAPM) error check is fixed.

* The number of disconnects from LAPM retrains within a retrain 
  is reduced.

* Rate reduction due to LAPM errors has been made less sensitive.

* Motorola SM56 modems can now connect with V.90.

* A V.90-to-V.34 fallback problem, which can result in a disconnect, is
  fixed by earlier V.34 detection.

* A-law V.90 connectability is improved.

* K56flex connectability is improved by an increase in a K56flex timeout.


_______________ New Features

This ComOS release adds extended modem debugging information for
troubleshooting to the existing modem debugging commands.


_______________ Limitations

Lucent Remote Access is still fixing some problems with Rockwell HCF and
Cirrus Logic modems.  If you experience any difficulties with modems,
verify that the client modem is running the latest firmware, and then refer
to http://www.livingston.com/tech/bulletin/comos-modem.html.
If these instructions do not help, contact Lucent Remote Access Technical
Support.


_______________ Troubleshooting

As part of modem troubleshooting, confirm that the client modem 
is running the latest firmware before submitting a modem trouble report.

When making a report of a new modem problem, send the following
information to technical support:

* ComOS version
* Client modem manufacturer
* Client modem model
* Results on client modem of commands ATI0 through ATI11
* Whether the problem is reproducible

Lucent Remote Access might want to monitor your PortMaster while the
client modem reproduces the problem.


_______________ Upgrade Instructions

You can upgrade your PortMaster 4 using PMVision 1.2 or pmupgrade 4.0
from PMTools or any later release of those programs. You can also use
the older programs pminstall 3.5.3, PMconsole 3.5.3, or PMconsole for
Windows 3.5.1.4. In addition, you can upgrade using TFTP with the "tftp
get comos" command from the PortMaster command line interface.

*** CAUTION!  If the upgrade fails, do NOT reboot! Contact Lucent Remote
*** Access Technical Support without rebooting.

The upgrade process on the PortMaster 4 erases the configuration area
from nonvolatile memory and saves the current configuration into
nonvolatile memory. Never interrupt the upgrade process, or loss of
configuration information can result. This upgrade does not otherwise
affect your stored configuration in the PortMaster.

If you are downgrading from ComOS 4.1b15 to ComOS 4.0.3c2 you must do
the downgrade to ComOS 4.0.3c2 twice, because of changes in the flash
memory layout in ComOS 4.1b15.

The installation software can be retrieved by FTP from
ftp://ftp.livingston.com/pub/le/software/, and the upgrade image
can be found at ftp://ftp.livingston.com/pub/le/upgrades:

ComOS		Upgrade Image	Product
_________	_____________	_____________________________________
4.0.3c2		pm4_4.0.3c2	PortMaster 4

________________________________________________________________________

	Copyright and Trademarks

Copyright 1999 Lucent Technologies. All rights reserved.

PortMaster, ComOS, and ChoiceNet are registered trademarks of Lucent
Technologies, Inc. RADIUS ABM, PMVision, PMconsole, [[PortAuthority,]]
and IRX are trademarks of Lucent Technologies, Inc. All other marks are the
property of their respective owners.

	Notices

Lucent Technologies, Inc. makes no representations or warranties with
respect to the contents or use of this publication, and specifically
disclaims any express or implied warranties of merchantability or
fitness for any particular purpose. Further, Lucent Technologies, Inc.
reserves the right to revise this publication and to make changes to
its content, any time, without obligation to notify any person or
entity of such revisions or changes.

	Contacting Lucent Remote Access Technical Support

Lucent Technologies Remote Access Business Unit (previously Livingston
Enterprises) provides technical support via voice, fax, electronic
mail, or through the World Wide Web at http://www.livingston.com/.
Please specify your ComOS version number when reporting problems
with this release.
 
Internet service providers (ISPs) and other end users in Europe, the
Middle East, Africa, India, and Pakistan should contact their
authorized Lucent Remote Access sales channel partner for technical
support; see http://www.livingston.com/International/EMEA/distributors.html.

For North and South America and Asia Pacific customers, technical
support is available Monday through Friday from 7 a.m. to 5 p.m. U.S.
Pacific Time (GMT -8).  Dial 1-800-458-9966 within the United States
(including Alaska and Hawaii), Canada, and the Caribbean, or
1-925-737-2100 from elsewhere, for voice support. Otherwise, fax to
1-925-737-2110, or send email to support@livingston.com
(asia-support@livingston.com for Asia Pacific customers).

