Asia PR News

MOUNTAIN VIEW, Calif., July 31 /PRNewswire-AsiaNet/ –

Oi relies on Ditech’s VQA solution to enhance mobile service under challenging
conditions during the popular event

Ditech Networks, Inc. (Nasdaq: DITC), a leader in the development of voice
processing systems for communications networks, today announced that Oi
deployed Ditech solutions to ensure voice quality for users of its mobile phone
network during the recent 2007 Pan American Games in Rio De Janeiro, Brazil.

During the two-week competition, the region attracted more than 40,000
sports fans from around the world. For Oi, this posed several challenges, such
as maintaining high-quality mobile calls in noisy crowds and providing
high-level service to foreign visitors who are roaming with GSM mobile
devices. Oi chose to implement Ditech’s Voice Quality Assurance (VQA) solution
that improves the call experience for both current subscribers in addition to
the thousands of travelers who visited Rio de Janeiro.

Ditech’s VQA solution reduces background noise and echo on every call
while simultaneously adjusting voice levels. Additionally, it allows Oi to
better utilize speech compression technology, which is a cost-effective method
to increase network capacity to support a surge in mobile phone users. The
combination of improved voice quality in noisy, crowded conditions with an
increase in network capacity gave Oi a cost-effective, high-value solution for
supporting mobile subscribers during the 2007 Pan American Games.

"Ditech’s VQA solution allows Oi to provide high-value mobile service even
under the kind of extreme conditions found during the Pan American Games,"
said Oi Engineering Director Antonio Parrini. "Not only can Oi deliver
improved voice quality, but Ditech’s solution lets us make greater use of
half-rate codecs to increase network capacity."

"The demand for mobile service in Latin America is growing significantly,"
said Todd Simpson, Vice President of Marketing for Ditech Networks. "Adding
capacity for a worldwide sporting event like the 2007 Pan American Games makes
supporting this growth even more challenging. Oi has solved the problem of
rapid subscriber growth with improved voice quality and Ditech is proud to be
part of the company family."

Oi ("Hello" in Portuguese) is the largest private corporation in Brazil
and an official sponsor of the Pan American Games. The company provides mobile
phone service to over 13.4 million customers throughout 16 states, including
the Rio area and the athletic venues used during the Pan American Games.

About Ditech Networks
Ditech Networks supplies voice processing equipment for telecommunication
networks around the world. Ditech Networks’ solutions incorporate advanced
voice processing, Session Initiation Protocol (SIP), and security technologies
delivered on carrier-grade scalable platforms to enhance the delivery of
communications services over mobile, Voice over IP, and wireline networks.
Ditech Networks’ customers are premier network operators including Verizon
Wireless, Sprint/Nextel, Orascom Telecom, and others that collectively serve
more than 150 million subscribers. Ditech Networks is headquartered in
Mountain View, California. For more information, visit
http://www.ditechnetworks.com.

SOURCE Ditech Networks, Inc.

CONTACT: press, Rob Adler of PR@vantage, +1-415-984-1970,
radler@pr-vantage.com, for Ditech Networks; investors, Bill Tamblyn of Ditech
Networks, +1-650-623-1309
Web site: http://www.ditechnetworks.com
(DITC)