Underground coal mine expands ActiveMine(TM) installation

    -   Active Control receives order for new wireless network equipment from
        existing customer
    -   Now at 57 nodes, customer's MSHA-approved wireless Wi-Fi mesh network
        is largest in US

    TSX-V: ACT

    TORONTO, May 26 /CNW/ - Active Control Technology Inc. (TSX-V:ACT) today
announced that an existing customer has expanded its deployment of
ActiveMine(TM), the premier wireless voice communications, tracking and data
network for the mining industry.
    The customer has ordered seven additional MSHA-approved wireless Wi-Fi
nodes and network equipment to meet the needs of its expanding underground
coal mine in West Virginia, just one month after the initial installation.
    "Existing customers like this one generate recurring revenues for ACT
through sales of additional nodes, networking and other equipment as their
operations expand," said Steve Barrett, President and CEO, Active Control.
"ActiveMine's plug-and-play installation makes it easy and cost-effective for
our customers to expand their underground wireless networks."
    The expanded installation is the largest MSHA approved wireless Wi-Fi
mesh network in the U.S. and is believed to be the largest underground Wi-Fi
mesh network anywhere. The mine's ActiveMine network now has 57 nodes
extending several miles underground to two separate mine faces.
    ActiveMine's industry-leading, low latency technology enables clear,
distortion-free digital voice communications over a mesh network with many
wireless 'hops' (signal transmission from one node to the next). In contrast,
with other Wi-Fi mesh technologies, voice transmission may not be possible
after more than five to six hops. This unique performance is made possible by
ActiveMine's use of third-generation Wi-Fi mesh networking technology from
    "ActiveMine's unique wireless capabilities - above all its reliable,
crystal clear voice quality over many hops - have made it a core part of our
customers' mining operations," Barrett said. "We thank MeshDynamics for
partnering with us to make this technology available to our customers, and for
their tremendous ongoing support."
    The expanded installation has been toured recently by several prospective
customers, who have seen first-hand how well it performs in working
underground operations.

    Additional Details on the Expanded Deployment

    Both mine faces are backed up with redundant nodes covering the primary
and secondary escape ways. The network also covers the above-ground yard area
and all support buildings. The first five wireless hops are shared by both
arms of the network, with one arm extending an additional 18 hops and the
other an additional 12 hops. To the longest point, the wireless signal travels
over a total of 23 hops. ActiveMine's network has been designed to support at
least 100 wireless hops and hundreds of nodes, enabling voice communications -
the critical mining application for both safety and productivity - in very
large mines.

    Active Control Helps Mines Meet Emergency Response Plan Requirements

    Active Control has developed an Emergency Response Plan (ERP) template to
help U.S. underground coal mine operators meet MSHA's June 15, 2009 deadline
to complete plans. The ERPs, which are similar to mine safety plans already
required in West Virginia, cover various aspects of emergency preparedness
including wireless communications and electronic tracking systems. Mine
operators are invited to contact Cameron Sturgess at
csturgess@activecontrol.com or (416) 402-0345 to arrange for a copy of the
    On April 29, 2009, MSHA provided additional information on its mine
communications and tracking requirements under the Mine Improvement and New
Emergency Response Act (MINER) Act. A Q&A to help guide mine operators on the
requirements and deadlines has been posted by MSHA at

    NIOSH Communication and Tracking Workshops

    ACT presented at workshops sponsored by the National Institute of
Occupational Safety and Health (NIOSH) in Charleston, WV last week and Denver,
CO the previous week. MSHA and NIOSH provided 240 mine representatives with
guidance about preparing Emergency Response Plans due June 15th. The
presentations generated considerable interest in ActiveMine and, as a result,
ACT is now quoting on installations at an additional 17 mines.

    Active Control Annual General Meeting

    Active Control's annual general meeting of shareholders has been set for
10 a.m. Thursday, June 11th at the Toronto Board of Trade.

    About MeshDynamics, Inc.

    MeshDynamics delivers one of the only third-generation wireless mesh
networking solutions for high-performance outdoor data, voice, and video
networking. Based on sophisticated dynamic channel-agile networking
algorithms, MeshDynamics' MD4000 family of Structured Mesh(TM) wireless nodes
deliver very low-latency and low-jitter performance, even over multi-hop
topologies where many earlier generation wireless mesh networking products
fail. MeshDynamics' products are in use worldwide in mining and industrial,
homeland security/defense, transportation, and metro/municipal network
applications. MeshDynamics, Inc. is privately held and headquartered in Santa
Clara, CA. More information at: www.meshdynamics.com.

    About Active Control Technology

    Active Control Technology is a mining services company specializing in
advanced wireless productivity and safety systems. The company's MSHA-approved
ActiveMine system provides two-way wireless voice communication, real-time
tracking of personnel and assets, and high bandwidth data applications such as
streaming video and operational data from mining machinery, over a robust
wireless Wi-Fi network. Located in Burlington, Ontario, Canada, Active Control
trades publicly on the TSX Venture Exchange under the symbol ACT. For more
information, visit www.activecontrol.com.

                        Get more out of your mine(TM)

    Neither TSX Venture Exchange nor its Regulation Services Provider (as
    that term is defined in the policies of the TSX Venture Exchange) accepts
    responsibility for the adequacy or accuracy of this release.

    Cautionary Note Regarding Forward-Looking Statements: This press release
contains forward-looking statements that involve risks and uncertainties,
which may cause actual results to differ materially from the statements made.
When used in this document, the words "may", "would", "could", "will",
"intend", "plan", "anticipate", "believe", "estimate", "expect" and similar
expressions are intended to identify forward-looking statements. Such
statements reflect our current views with respect to future events and are
subject to such risks and uncertainties. Many factors could cause our actual
results to differ materially from the statements made, including those factors
discussed in filings made by us with the Canadian securities regulatory
authorities. Should one or more of these risks and uncertainties, such as
changes in demand for and prices for the products of the Company or the
materials required to produce those products, labour relations problems,
currency and interest rate fluctuations, increased competition and general
economic and market factors, occur or should assumptions underlying the
forward looking statements prove incorrect, actual results may vary materially
from those described herein as intended, planned, anticipated, or expected. We
do not intend and do not assume any obligation to update these forward-looking
statements, except as required by law. The reader is cautioned not to put
undue reliance on such forward-looking statements.

    %SEDAR: 00007946E

For further information:

For further information: Steve Barrett, President & CEO, Active Control
Technology, Tel.: (905) 635-3130, Email: sbarrett@activecontrol.com; Media
inquiries for ACT: Don Hogarth, Tel.: (416) 565-8920, Email:
don@hogarthpr.com; Media inquiries for MeshDynamics: Byron Henderson,
MeshDynamics, Inc., Tel.: (408) 398-6395, Email: news@meshdynamics.com

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