Editorial Contact: Kim Miller
KLM Public Relations Inc.
(617) 610-0583
klmcomm@hotmail.com

New York, NY — September 19, 2006 — The conversion technology and switching expert, Transition Networks Inc., a wholly owned subsidiary of Communications Systems Inc., today announced the introduction of its new, Gigabit Ethernet copper-to-fiber media converter. This converter provides a cost-effective method for integrating fiber optic cabling into 1000Mbps UTP environments. In addition, its enhanced features provide more network management information to network administrators than had previously been available.

“Network managers value devices that can provide high levels of network management information”, says Bill Schultz, vice president of marketing at Transition Networks, “This newest media converter provides customers with a cost-effective method for upgrading their networks. As always, Transition is committed to delivering feature-rich products, such as the new Gigabit converters, to assist in quickly identifying and troubleshooting network link failures.”

New Product Features
The new GETF-110 series of Gigabit Ethernet copper-to-fiber media converters replaces Transition’s GETF-105 media converters. With the new product line, customers benefit from new features like Transparent Link Pass Through and Remote Fault Detect. These features prevent the media converters from isolating a head-end device from link failures at the remote-end by monitoring the status of both the copper and fiber links. Should any link go down, the converters will pass the link status information on to both end devices, notifying them of the link failure.

Fiber Loopback is another new feature found in this Gigabit converter. Fiber Loopback puts the converter into a special mode that enables the device to loop back the signal from the RX port to the TX port over the fiber for testing and troubleshooting purposes during the installation of the converter.

Also new to this enhanced Gigabit converter is the support for SFP optics. Users can choose between converters with fixed fiber interfaces and converters with an open SFP slot. Converters with an open SFP slot offer the flexibility to support multimode, single-mode or even long haul single-mode fiber transmissions based upon the individual SFP module used in the converter.

Product Configuration
The Gigabit converters are available in either stand-alone or Point System chassis card form factors. The advanced features are controllable via a 6-position dip switch accessible on the side of the converter. These same features can be monitored and configured on chassis based converters through Transition’s Focal Point software. Focal Point is an SNMP based management application.

Product Availability
The products are available immediately. For more information, please view our product data sheets available online at http://www.transition.com/TransitionNetworks/Products2/Family.aspx?Name=sgetf10xx-110. Customers can also contact Transition Networks at (800) 526-9267 or visit www.transition.com for the latest information.

About Transition Networks Products
Transition Networks's conversion products are known for their ruggedness and reliability. They have a 99.4 percent customer acceptance rating, meaning that approximately one in 1,000 experience failure in the field. All Transition Networks brand of media converters carry a lifetime warranty.

About Transition Networks, Inc.
Transition Networks Inc. offers networking connectivity solutions that make networks perform better, faster and more reliably while helping companies leverage their existing networking infrastructure. The company’s Transition Networks brand of media converters make conversion between disparate media types possible, providing conversion technology solutions that offer the necessary adaptations without affecting the performance, nature or appearance of the network. Its complete Milan portfolio of multilayer switching and wireless products are designed to facilitate low-cost network evolution with unique solutions, easing the stress on networks caused by high-bandwidth applications. Based in Minneapolis, Transition Networks distributes hardware-based connectivity solutions exclusively through a network of resellers in 50 countries including Ingram Micro and Tech Data. Transition Networks is a wholly owned subsidiary of Communications Systems, Inc., a publicly traded company (AMEX: JCS).

Statements regarding the Company's anticipated performance in 2006 are forward-looking and involve risks and uncertainties, including but not limited to: competitive products and other factors discussed from time to time in the Company's filings with the Securities and Exchange Commission.