Editorial Contact:
Kim Miller
Tier One Partners
(617) 610-0583
kmiller@tieronepr.com

Interop, Las Vegas — April 29, 2008 — Transition Networks Inc., the switching and conversion technology expert, a wholly owned subsidiary of Communications Systems, Inc. (AMEX: JCS), today announced the introduction of a new 8-Port Gigabit Power-over-Ethernet (PoE) switch. This product expands Transition Networks’ Milan portfolio of multilayer switching products, enabling customers to easily supply power to powered devices (PD), such as wireless access points and voice over IP phones, which are capable of handling speeds up to Gigabit Ethernet. In addition, the 8-port switch includes a fan-less design, making it a perfect fit for all environments from the board room to the server room.

“Transition Networks continues to push the envelope in delivering innovative products to the marketplace,” said Patrick Schaber, director of marketing at Transition Networks. “As we expand our PoE switch portfolio to accommodate customer applications, we look for opportunities to enhance our customers’ ability to leverage PoE solutions. This new switch is able to provide up to 25 watts of power on port 1 and can unobtrusively sit on a table in a meeting room because of its fan-less design. It is with these features that established Transition Networks as an industry leader.”

Product Features
The MIL-SM8TAF1GPA is a web-managed Gigabit PoE switch that is designed to deliver performance and control to your network. It has 7 x 10/100/1000Base-T ports with 1 x 10/100/1000Base-T RJ-45 / Gigabit SFP combo port. All of the RJ-45 ports support IEEE 802.3af standard for Power over Ethernet. Auto-negotiation and auto MDI/MDI-X are also standard on all of the RJ-45 ports. The MIL-SM8TAF1GPA has jumbo frame support up to 9.6Kbytes. The switch includes front LED’s for easy “at-a-glance” troubleshooting in addition to a web-based management interface as well as supporting SNMP v1 and v2c.

The MIL-SM8TAF1GPA provides a wide range of advanced features including flow control, broadcast storm suppression, CoS priority queuing and multicast filtering. Some of the management features of the MIL-SM8TAF1GPA are listed below:

• Power-over-Ethernet (PoE) – The MIL-SM8TAF1GPA’s eight RJ-45 ports support the IEEE 802.3af PoE standard. A maximum PoE power budget for the switch is defined so that power can be centrally managed, preventing overload conditions at the power source. Additionally, port one can be configured to provide as much as 25 watts of power when set to “High” mode.
• Configuration Backup and Restore – This feature allows users to save the current configuration settings to a file on the web management station and later use the file to restore the switch configuration settings if required.
• Authentication – The MIL-SM8TAF1GPA supports port-based user authentication via the IEEE 802.1X protocol.
• Port Configuration – This element allows customers to manually configure the speed, duplex mode and flow control used on specific ports or use auto-negotiation to detect the connection settings used by the attached device.
• Port Mirroring – The MIL-SM8TAF1GPA can unobtrusively mirror traffic from any port to a monitor port.
• Port Trunking – Ports can be combined into an aggregate connection. Trunks can be manually setup or dynamically configured using IEEE 802.3ad Link Aggregation Control Protocol (LACP). The MIL-SM8TAF1GPA supports up to 4 trunks.
• Broadcast Storm Control – Broadcast suppression prevents broadcast traffic from overwhelming the network.
• Static Addresses – A static address can be assigned to a specific interface on the switch.
• IEEE 802.1D Bridge – The MIL-SM8TAF1GPA supports IEEE 802.1D transparent bridging.
• Store-and-Forward Switching – This feature prevents bad frames from entering the network and wasting bandwidth
• Virtual LANs (VLANs) – The MIL-SM8TAF1GPA supports up to 64 VLANs. IEEE 802.1Q and port based VLANs are supported.

For complete details on all of the features and functions of this new PoE Ethernet switch and to view our entire product portfolio please visit www.transition.com.

Product Configuration
The MIL-SM8TAF1GPA comes standard with desktop mounts and 19” rack mount ears.

Product Availability
The MIL-SM8TAF1GPA will be available for shipping in May. The list price for the MIL-SM8TAF1GPA is $485.00. Please contact Transition Networks at (800) 526-9267 or www.transition.com for the latest information.

About Transition Networks Products
Transition Networks’ 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. MILAN by Transition Networks products offer a five year 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 products is 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 2008 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.