Need Help?

DEI software purchases include one year of technical support and software updates.  We also offer online support for users of our free trials.

Online Documentation

In addition to the documentation distributed with each product, you can access the latest application manuals online.

Technical Notes

Many common issues are addressed by articles in our Technical Notes archive.  If you are not sure which article applies, you can search by keywords.

Technical Support Request Form

To ensure that we have all the information we need to answer your question, please fill out the form linked below.  The more we know about your issue, the faster we can help you.

Technical Support Telephone

Licensed customers may call our development office at 405-292-2280.  Office hours are 9am to 5pm US Central time on regular business days.  For after-hours support call 405-833-8528.

Customer Service Telephone

For pre-sales inquiries and general customer service, including requests for a 21-day extended trial, call our sales office at 877-292-2280 or 617-500-0002.

International Support

If you purchased a DEI product through one of our regional sales partners or resellers, please contact them for technical support.

Free Test Utility

Are you getting the most out of your network?  This free diagnostic tool will compare TCP and MTP performance head-to-head and provide you with valuable information about your bandwidth and firewalls.

Diagnostic Services

In addition to product related technical support, DEI also offers fee-based network performance troubleshooting assistance.  See our Diagnostic Services product page for details.