Company Contact:
Patrick Schaber
Transition Networks
(952) 996-1526
pats@transition.com
Editorial Contact:
Kim Miller
Tier One Partners
(617) 610-0583
kmiller@tieronepr.com
Transition Networks Expands Ethernet Switch Portfolio
Three New Switches Offer Feature Rich Capabilities At Affordable Prices To Meet The
Growing Demands Of Business Customers
Minneapolis, MN — February 11, 2008 — Transition Networks Inc., the conversion
technology expert, a wholly owned subsidiary of Communications Systems, Inc. (AMEX:
JCS), today announced the introduction of three new Ethernet switches. These new
MILAN by Transition Networks Ethernet switches are designed to meet the port,
performance, security and management requirements of today’s business customers.
“We continue to expand and enhance our Ethernet switch portfolio in anticipation of the
changing needs of our business customers,” said Patrick Schaber, director of marketing
at Transition Networks. “With these new Ethernet switches, customers using or
considering applications such as VoIP or multimedia services within their network are
able to take advantage of the QoS, IGMP and other advance features that these
switches offer at an affordable price.”
Transition’s Ethernet switch portfolio includes the following switch models:
 MIL-S4800 (Unmanaged 48 port 10/100Base-TX plus 1 10/100/1000Base-TX
port and 1 Gigabit SFP port)

MIL-SM4004TG (Managed 4 port 10/100/1000Base-TX plus 4 SFP 1000Base-X
ports)

MIL-SEM24T4GPA (Managed 20 port 10/100/1000Base-TX plus 4 RJ-45/SFP
combo ports)
Product Features
The MIL-S4800 is an unmanaged Ethernet switch that has 48 10/100 Base-TX ports with
1 10/100/1000 Base-TX port and 1 Gigabit SFP port. The switch has automatic
MDI/MDIX to adjust for straight-through or crossover cables during installation. The
switch has a rugged metal chassis with internal power supply to provide reliability. The
MIL-S4800 conforms to the IEEE 802.3, 802.u, 802.3ab, 802.3z and 802.3x standards.
The MIL-SM4004TG is a managed Ethernet switch that has 4 10/100/1000Base-TX
ports plus 4 Gigabit SFP ports. The MIL-SM4004TG layer 2 managed Ethernet switch
provides high performance non-blocking switching. Features of the MIL-SM4004TG
include port based, dynamic and static VLANs, GVRP, VLAN tagging, IGMP snooping or
querying, port mirroring and DHCP client or server modes. Four priority queues insure
minimum delay for voice over IP or multimedia networks. Non-blocking 16Gbps
architecture assures rapid packet delivery while the 8,000 MAC address table provides
swift lookup and packet forwarding. The MIL-SM4004TG can be remotely managed via
the web-based GUI, CLI and menu based commands via telnet or the DB-9 console port
in addition to SNMP V1/2/3.
The MIL-SEM24T4GPA is a managed Ethernet switch that has 20 10/100/1000Base-TX
ports plus 4 10/100/1000Base-TX/Gigabit SFP combo ports. The MIL-SEM24T4GPA
layer 2 managed Ethernet switch provides high performance non-blocking switching.
Features of the MIL-SEM24T4GPA include port based and 802.1Q VLANS, IGMP
V1/V2, spanning tree, rapid spanning tree, 10K Jumbo frame support and link
aggregation control protocol (LACP). With Quality of Service (QoS) and Class of
Service (CoS) the MIL-SEM24T4GPA insures minimum delay for voice over IP or
multimedia networks. Non-blocking 48Gbps architecture assures rapid packet delivery.
The MIL-SEM24T4GPA can be remotely managed via the web-based GUI, CLI via telnet
or the DB-9 console port in addition to SNMP V1/2.
For complete details on all of the features and functions of these three new Ethernet
switches and to view our entire product portfolio please visit www.transition.com.
Product Configuration
The MIL-S4800 and MIL-SEM24T4GPA come standard with desktop mounts and 19”
rack mount ears. The MIL-SM4004TG comes standard with desktop mount and has
optional 19” rack mount ears available.
Product Availability
All three Ethernet switches are in stock and shipping now. Please contact Transition
Networks at (800) 526-9267or 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.
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).
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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.