Maintain Voice Quality While Increasing Capacity

HIGHLIGHTS

  • Measure the subscriber's exact call experience
  • Increase the use of HR codecs up to 20% to add call capacity
  • Set aside approx. 5% of spectrum for 3G services
  • Get Ditech's Voice Quality Audit Report

“We chose Ditech's voice quality solution to enhance the overall quality of our network while improving our capacity utilization.” Tamer El Mahdy
Orascom Telecom Holding

Ditech Networks makes the network capacity promise of GSM half-rate (HR) and AMR half-rate codecs a reality, without compromising voice quality.

Equally important, Ditech's solution has the ability to free up radio spectrum, enabling mobile carriers to move more quickly from 2G to 3G services on the existing network.

Optimizing voice requires a full understanding of what subscribers are experiencing, and quantifying the impact on voice quality of all the variables in the network and in the subscriber's environment. We deliver this knowledge to our customers, and coupled with mitigating these impairments, the opportunity we provide to service providers is compelling:

  • Ditech has increased the use of low bitrate codecs (GSM-HR & AMR-HR) up to 20 percent or more during peak calling times. This is a highly successful strategy for congestion relief when aggressive use of half-rate is required to serve high-volume calling areas.
  • Our solution enables cost-effective deployment of UMTS broadband data services at 900 MHz, by increasing GSM voice capacity on the remaining GSM frequencies–freeing up to 5 percent of the available radio spectrum.

Until now, mobile carriers that deployed half-rate codecs have done so at the cost of degrading voice quality, causing an increase in customer complaints and reduced call times. In conditions where impairments such as background noise, acoustic echo and level mismatch occur, voice quality degrades even more quickly, moving a greater number of calls into the Churn Zone. (The Churn Zone is the percentage of calls whose voice quality falls below the industry minimum Mean Opinion Score MOS, or the minimum score set by the carrier.)

These conditions are typical at peak calling times, when revenue-producing call traffic is at its highest volume.

Ditech provides the solution necessary to increase the use of HR and AMR-HR codecs without degrading delivered voice quality.

This remarkable capability is delivered with Ditech's Experience Intelligence service, which measures impairments that are directly linked to customer dissatisfaction, and presents these findings in the form of a MOS value. And our Voice Quality Assurance product, which reduces or eliminates these impairments.

These products are deployed on our carrier-grade, high density platforms based on what type of network is being supported.