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Products Based on Advanced ASIC Designs Now Available

Natural MicroSystems (NASDAQ: NMSS), the technology leader enabling a new
era of communications, is today introducing its revolutionary PowerAccess
architecture-capable of supporting over ten thousand ports in a single
CompactPCI® chassis-and reducing the cost to produce broadband access
switches and access gateways to an unprecedented $30 per port. At the same
time, NMS is announcing the availability of the first PowerAccess products
based on this architecture.

The PowerAccess architecture is the foundation of a new family of
high-capacity hardware and software platforms providing the base for
lower-cost, higher-density network access offerings to appeal to network
operators and service providers, who need more economical ways to deliver
broadband services in today's revenue-conscious environment.
Communications equipment developers can rapidly create more compelling
offerings when they use NMS' PowerAccess technology inside their own
access switches and access gateways, including voice-over-Internet
Protocol (VoIP) gateways, voice-over-digital subscriber line (VoDSL)
gateways, voice-over-wireless local loop (VoWLL) gateways, and broadband
access switches. In the case of broadband access switches, PowerAccess
technology will enable developers to build solutions competitive with the
vastly more expensive Class 5 telecommunications switches.

Three NMS platforms are the first to take advantage of the PowerAccess
architecture, implemented within a new PowerAccess Bus for each platform.
Initial NMS products enabled with PowerAccess technology are: the PA
HYPER-T3 DS-3/STS-1 broadband access adapter (now shipping), the new
high-capacity PA-16 T1/E1 broadband access adapter and a new PA200 voice
over broadband ATM platform. NMS is announcing the PowerAccess
architecture and the availability of the initial product line offerings in
conjunction with its exhibit and sponsorship at the VoDSL Europe 2001
Conference and Exhibition in Paris, France this week (January 16-19).

Cost per Port and High Capacity Are Boons to Profit-Conscious, Growth
Business and consumer demand for lucrative voice-over-IP and
voice-over-broadband services, coupled with high-speed access technology,
come together in a largely untapped market with huge potential. According
to leading analyst firm Probe Research, Inc., voice over packet gateway
port shipments will reach 9.2 million ports per year in 2002. In response,
network operators and service providers continue seeking ways to fill the
demand, while ensuring that the cost of new infrastructure and
provisioning doesn't consume their profit margins.
"The market opportunity associated with innovative voice-over-broadband
services is one of the most important and promising areas in the emerging
packet convergence industry," said Tom Valovic, Program Manager for IP
Telephony at IDC. "By pushing the envelope for both port density and port
cost, Natural MicroSystems' announcement will help to facilitate the
deployment of these systems in today's cost-sensitive carrier

PowerAccess Bus Advances CompactPCI Capabilities

"Higher port density is simply fundamental to reduce system costs for
next-generation broadband switches and gateways," said Michel Laurence,
vice president and general manager of NMS' Network Access business. "The
PowerAccess architecture blasts through the barrier that until now has
limited the scalability of the CompactPCI format. And importantly, we have
retained all the best of CompactPCI-the openness and high availability
that communications equipment suppliers and their customers require for
fast time-to-market and reliable operation."

To expand the capacity attainable with standard CompactPCI designs, NMS'
PowerAccess architecture features the PowerAccess Bus-an external,
parallel TDM (time division multiplexing) bus similar to the H.110 TDM
data bus specified by CompactPCI. The PowerAccess Bus complements the
H.110 bus by doubling the number of voice ports (that is, adding an extra
2,048 ports) to a CompactPCI chassis. In contrast to the H.110 bus, the
PowerAccess Bus can be partitioned to connect groups of PowerAccess boards
via cable between rear I/O connectors. This enables development of very
high capacity gateways that can scale to more than ten thousand ports.

First PowerAccess Products Detailed

NMS is also announcing its first platforms to be equipped with PowerAccess
technology. The award-winning PA HYPER-T3 DS-3/STS-1 broadband access
adapter, announced last year, is immediately available with the
PowerAccess Bus.

The three new NMS products making their debut in Paris today are:

· PA 16 T1/E1 access adapter. At 480 ports, this broadband access adapter
features twice the capacity of any comparable product currently on the
market. The 16 T1/E1 adapter will be available in March, 2001.

· M100 Echo cancellation and compression option. A mezzanine module for
both the PA Hyper T3 or the PA 16 T1/E1 access adapters. Using advanced
DSP and ASIC technology, this option provides up to 672 ports of standard
G.165 echo cancellation and 32 or 16 kbps ADPCM compression (G.726-16).
Available in Q2, 2001.

· PA 200 Voice over broadband platform. Based on high performance, second
generation ASIC technology, this board and software platform delivers 2048
ports of TDM to ATM processing with an OC-3 network interface. Available
in Q2, 2001.

About Natural MicroSystems

Natural MicroSystems (NASDAQ: NMSS) is the technology leader making it
possible for the world's top networking and communication equipment
suppliers to create and accelerate communications infrastructure and
services. The Framingham, MA company designs, develops and supplies
network-quality hardware and software components and provides design and
customization services that are enabling a new era of communications.

Deployed in more than 65 countries, NMS' products and technologies are at
the foundation of today's high-value communications systems, including
network-based enhanced service platforms, media and access gateways, media
servers, voice portals, web-enabled call centers, unified messaging
platforms and wireless networks. NMS has a long history of technology
innovations that advance the rapid growth of the communications industry
worldwide, including breakthroughs such as the first complete open IP
gateway, the first complete open packet media server and leadership in
bringing open, scalable CompactPCI to the telecommunications industry.
More information about NMS is available at

Natural MicroSystems, PowerAccess and PowerAccess Bus are trademarks of
Natural MicroSystems Corporation. CompactPCI is a registered trademark of
the PCI Industrial Computer Manufacturers Group (PICMG). All other product
or corporate references are trademarks or registered trademarks of their
respective companies.

For further information please contact:

Tracey Farrant

Brodeur Worldwide

Tel: +44 (0) 1753 790700


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