Improving Voice Call Quality in Algeria
Ditech Networks says that Orascom Telecom is completing full deployment of it's products in the Djezzy GSM mobile services network in Algeria after an audit showed a measurable increase in voice quality. 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.
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.
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.
Posted to the site on 27th November 2007
