"Our customers count on us to deliver power when they need it most,
especially during the summer. The area experienced such peak electric demand
between June 10 and 15 when temperatures reached 90 degrees or higher on five
of the six days. The average annual
household electric usage has jumped 21 percent since 1993, even though PECO's
electric rates essentially have been unchanged over the same time. Wall mount and rack mount brackets are
also available offering flexibility in the mounting environment.

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One of PECO's largest single capital projects in years, the Tuna sub is
named after the former tuna packaging plant where it is located . "Reliability
is the foundation of our business, and we will always keep trying to improve
our service and hopefully increase our customer satisfaction. Transition Networks is a
wholly owned subsidiary of Communications Systems, Inc.

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Substations tap into high-voltage transmission
lines connected to power plants and convert power into lower voltage for
distribution to local communities."

Product Features
In addition to being IEEE1613 compliant, these devices offer many features
unique to the substation automation market such as Link Pass Through, Far-End
Fault, Pause and the widest selection of fiber optic ports and distances.

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However, customers in some areas do not experience such steady reliable
service.1
billion cubic feet of natural gas to residential , business and institutional
customers. The rugged metal enclosure has an IP30 rating and comes standard
with integrated DIN-rail mounting.

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.

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For mission-critical applications, a dual fiber port
version is offered that can be used in a redundant path configuration and the
extended operating temperature range of -40 degrees Celsius to +75 degrees
Celsius with no fans provides the utmost in reliability .

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"
Continually throughout the year, engineers for PECO evaluate reliability
performance and electric "load" on each of the company's 2,300 distribution
circuits and at 550 substations. PECO said the company's summer preparedness program aims to improve
service with fewer outages, especially for those who experience more than the
average, and shorter interruptions when they occur.

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5 million electric
and 460,000 natural gas customers in southeastern Pennsylvania.
A wide voltage input range accommodates both AC and DC voltages and all
models are available in either a single or redundant power configuration with
auto-sensing capability and field replaceable fuses.

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In 2004, the
company delivered 37.

This category lists companies that are Manufacturers Representatives of one or more manufacturing companies.

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, today announced the release of its new line of ruggedized Ethernet
switches designed to reliably operate in harsh networking environments found
in power generation plants, substations and other utilities. "With many 'industry first' features, including the
lifetime warranty, these substation-rated switches are the ideal complement to
our already extensive portfolio of industrial hardened media converters and
switches.

About Transition Networks Inc. 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.

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About Transition Networks Products
Transition Networks' conversion products are known for their ruggedness
and reliability. offers networking connectivity solutions that
make networks perform better, faster and more reliably while helping companies
leverage their existing networking infrastructure.

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Juniper Street in South Philadelphia . These projects and other maintenance work will
help us do just that," said Denis O'Brien, PECO Energy president. PECO said its average outage frequency for
customers in Philadelphia was its best ever . PECO's energy delivery services generated $4.com for additional information on their complete line of
media converters, switches or wireless products or to request a copy of their
Industrial Solutions CD.

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Peak hourly demand and the total electric delivery on two of
those days exceeded the highest levels for all of last summer, which was
considered unseasonably mild overall. PECO will
spend about $208 million on its local energy delivery system across the region
this year. These hardened
devices are backed by an unsurpassed lifetime warranty and are fully compliant
with electrical immunity, temperature ratings and environmental requirements
of IEEE1613, the standard for communications networking devices in electrical
power substations.

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PECO also is beginning work on another new substation on S.

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Thousands of
local customers should benefit from these circuit improvements , particularly
in Roxborough, Juniata, Frankford, Olney, Kensington, Hunting Park,
Torresdale, Queen Village, Germantown, Fox Chase, Somerton and University
City.
"Ethernet is becoming the protocol of choice for substation automation and
is being deployed to replace proprietary technologies used for mission-
critical applications," said Bill Schultz, vice president of marketing for
Transition Networks. They have a 99. All
Transition Networks brand of media converters carry a lifetime warranty .

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5 million megawatt hours (mWh) of electricity and 87.

Contact: Michael Wood
215-841-5555

, a wholly owned subsidiary of Communications Systems,
Inc.
Automatic Link Restoration re-establishes copper and fiber links with no user
intervention once the fault conditions are resolved and without the need to
power cycle the device.

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Additionally, PECO said it identified 20 distribution circuits across the
city for reliability improvements, including replacement of poles , crossarms,
transformers and cable as necessary, as well as installation of fuses, animal
guards and lightning arrestors and increased tree clearance.

Based in Philadelphia, PECO Energy is an electric and natural gas utility
subsidiary of Exelon Corporation (NYSE: EXC). PECO serves 1.

Transition Networks Strengthens Industrial Portfolio with Availability of Ruggedized Switch Line for Substation Environments

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4 percent customer acceptance rating, meaning
that approximately one in 1,000 experience failure in the field.

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Across its entire system, more
than 75 percent of PECO customers experienced only one or no service
interruptions in 2004, and fewer than five percent of its customers across
southeastern Pennsylvania had more than one power outage thus far this year. Lifetime Warranty Offers Industrial Industry Unsurpassed Reliability and
Support

MINNEAPOLIS, The conversion technology expert,
Transition Networks Inc., a publicly traded
company (Amex: JCS).

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It is one of
about 100 substations that supply power to the central business district and
neighborhoods across the city.

Product Configuration and Availability
Transition's new substation rated switches are available immediately and
in the following configurations , with both multimode and singlemode fiber port
options:

(1) 10/100Base-TX RJ-45 port and (1) 100Base-FX fiber optic port
(3) 10/100Base-TX RJ-45 ports and (2) 100Base-FX fiber optic ports with
redundant path
(4) 10/100Base-TX RJ-45 ports and (1) 100Base-FX fiber optic port

Please contact Transition Networks at (800) 526-9267 or
http://www.

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PECO Energizes New $25 Million Substation in Port Richmond in Time for Peak Summer Demand

Founded in 1881, PECO is one of the Greater Philadelphia Region's
most active corporate citizens, providing leadership , volunteer and financial
support to numerous arts and culture, education, environmental, economic
development and community programs and organizations. 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.

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49 billion in revenue
for Exelon .transition.
Transition Networks Inc.

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In addition, dry contact
relays provide alarming in the event of a port link failure or power supply
failure.

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Company Completes Other Reliability Improvements in City, Including New
Circuits, Substation Automation, Cable Replacements and Tree Clearance

PHILADELPHIA, PECO Energy has completed a three-
year, $25 million new electric substation in Philadelphia, which will boost
power capacity and help improve service reliability for several thousand
customers in the northeast quadrant of Center City and portions of the Port
Richmond and Northern Liberties sections of the city.
A great deal of work goes on every week "under the radar" to ensure air
conditioners, refrigeration equipment and other appliances stay in operation ,
even with the exceptionally high electricity usage during the summertime when
demand for electricity peaks.

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By mid-July, Tuna sub will feed a total of
10 distribution circuits serving customers.
Among numerous "summer readiness" initiatives, PECO also installed new
automation capability at its Holmesburg substation, expanded its Island Road
substation in Southwest Philadelphia, and designed a new distribution circuit
fed from its Packer substation in South Philadelphia at a total cost of about
$5 million.
O'Brien said PECO has invested consistently each year to meet the
increasing energy needs of the region's consumers.