Ditech Measurably Improves Voice Quality for Orascom Telecom's Mobile Service in Algeria

Voice quality audit with Ditech's Experience Intelligence solution shows up to 0.5 MOS improvement after Ditech products deployed

MOUNTAIN VIEW, Calif., Nov. 27 -- Ditech Networks (NASDAQ:DITC), a leading provider of voice quality solutions to the world's communications industry, today announced that Orascom Telecom is completing full deployment of Ditech's products in its Djezzy GSM mobile services network in Algeria after an audit showed a measurable increase in voice quality. Orascom Telecom Algeria is a division of Orascom Telecom Holdings, one of the largest mobile service providers operating in the Middle East, Africa and South Asia.

Orascom is completing deployment of Ditech's Voice Quality Assurance (VQA) solution after conducting a voice quality audit of its Djezzy network. The audit was implemented utilizing Ditech's Experience Intelligence (EXi) solution, which measures the impact of voice quality impairments from the caller's environment on the mobile call experience. After monitoring and analyzing call data over a four-week period, the audit showed that VQA increased Djezzy's MOS value (Mean Opinion Score) up to a full half-point.

"A 0.5 improvement in MOS is significant and will result in a measurable decline in subscriber churn," said Nagi Abboud, Chief Operation Officer of Djezzy in Algeria. "Ditech's voice quality solution is delivering to our subscribers a consistent, reliable call experience that is creating real differentiation in the marketplace."

Ditech's VQA solution enables Djezzy to unobtrusively and proactively reduce and remove voice quality impairments, including ambient noise, echo and mismatched speech levels, giving subscribers a consistent, high-quality call experience no matter where they are located, or in what environment they are making the call.

The impact of VQA on Djezzy's subscribers was quantified utilizing EXi. EXi captures uplink and downlink data live calls, and produces a MOS value based on the ITU G.107 E-model. In the Djezzy network, EXi analyzed background noise, acoustic echo and voice level mismatches, enabling Orascom to combine knowledge of its subscribers' call experience with existing network-based tests. This combination of information gives Orascom a comprehensive view of voice quality as it's actually delivered to subscribers.

"Orascom has become an industry leader in fully understanding and managing voice quality that's delivered to their subscribers," said Todd Simpson, President and CEO of Ditech Networks. "Many of the world's mobile carriers evaluate voice quality solely from a network perspective, which is only part of the picture. Orascom looks at the entire subscriber experience, and delivers to its customers consistent, high-quality mobile service."

Communications providers worldwide often use MOS as the primary measure of voice quality. In mobile networks, a MOS value is typically derived from tests that measure the impact of network infrastructure on voice quality, but not voice quality impairments that occur in the caller's environment. Until the introduction of EXi, voice quality impairments in the callers' environment, which total up to 30 percent of all problems on mobile calls, could not be fully quantified.

Ditech's EXi and VQA solutions provide the communications industry a comprehensive approach to managing voice quality. EXi non-intrusively monitors and measures voice quality on all live calls, and delivers an industry- standard voice quality score that reflects the subscriber call experience. VQA mitigates network-induced voice quality impairments and impairments from the caller's environment in real-time, on both ends of the call. Both products are integrated with Ditech's broad range of voice processor platforms, which cost- effectively deploy the solution across carrier networks.

About Orascom Telecom

Orascom Telecom is a leading international telecommunications company operating GSM networks in seven high growth markets in the Middle East, Africa and South Asia, having a total population under license of approximately 460 million with an average mobile telephony penetration of approximately 22 percent as at 30 September 2006. Orascom Telecom operates GSM networks in Algeria ("OTA"), Pakistan ("Mobilink"), Egypt ("Mobinil"), Tunisia ("Tunisiana"), Iraq ("Iraqna"), Bangladesh ("Banglalink"), and Zimbabwe ("Telecel Zimbabwe"). Orascom Telecom had over 50 million subscribers as of December 2006. Orascom Telecom owns 19.3 percent of Hutchison Telecommunications International Limited, a leading telecommunication services provider operating in eight countries. Orascom Telecom is traded on the Cairo & Alexandria Stock Exchange under the symbol (ORTE.CA, ORAT EY), and on the London Stock Exchange, its GDR is traded under the symbol (ORTEq.L, OTLD LI).

About Ditech Networks

Ditech Networks is shaping the future of voice quality through continuous innovation and leadership for the world's communications companies. Ditech's voice quality solutions are deployed in wireless and wireline networks to optimize the call experience. By delivering consistent, dependable voice quality, Ditech's products help global communications companies meet the multiple challenges of service differentiation, network expansion and call capacity. Ditech's customers include Verizon, Sprint/Nextel, Orascom Telecom, AT&T, China Unicom, Global Crossing and West Corporation. Ditech Networks is headquartered in Mountain View, California.

For more information, visit www.ditechnetworks.com.

Source: Ditech Networks

Rob Adler,
for Ditech Networks

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