Installing the OSS NAS Tools for C# for 5G

Applies to: NAS/C# 5G r15.6.0 v2.0.0

NOTE: For a 30-day trial version, setup the OSSINFO environment variable. Its value must specify the absolute pathname of the directory that contains the ossinfonascsharptrial license file (provided separately).

To install the software:

  1. Unzip the nascsharp5GS-r15.6.0_<platform>_<version>.zip file to a directory of your choice.
  2. Open the WELCOME.HTML file in the doc directory, where you will find a link to the NAS/C# API manual in the Product Documentation section, as well as other helpful links.
  3. Run the examples from the samples/ subdirectory of the OSS NAS Tools for C# for 3GPP Release 15.6.0 software installation. For more information, see the README.TXT file in each sample directory.
  4. To develop and run applications that use the NAS/C# API, add references to the ossnascs.dll and ossnas5gs1560cs.dll class libraries to your Visual Studio project.

For assistance with software installation, send email to

For technical support, send email to and include the following information in your message:

  • Your license number
  • Your name
  • Your company name
  • A brief description of the problem

This documentation applies to the OSS NAS Tools for C# for 5G v2.0.0 for 3GPP Release 15.6.0.

Copyright © 2021 OSS Nokalva, Inc. All rights reserved.
No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means electronic, mechanical, photocopying, recording or otherwise, without the prior permission of OSS Nokalva, Inc.
Every distributed copy of the OSS NAS Tools for C# for 5G is associated with a specific license and related unique license number. That license determines, among other things, what functions of the OSS NAS Tools for C# for 5G are available to you.