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Leading the Way in Voice Network Technology
Welcome to the Leaning Center, a resource for education on VoIP, session border control, voice quality, and echo cancellation. Our goal is to provide instructive and relevant information to help with your wireline, wireless, and VoIP implementations. We hope you find the Learning Center a helpful and informative resource.
Tutorials and Demonstrations
- VQA™/PQA™ Technology Demo –
A Flash presentation demonstrating how Ditech’s VQA and PQA technologies eliminate voice impairments.
- Echo Basics – An introduction to hybrid and acoustic echoes, network echo cancellers, and how echo affects customer satisfaction.
Webinars
- Monitoring the Quality of VoIP Services –
Featuring Ditech Networks and Brix Networks, this Light Reading webinar reviews cost-effective and scaleable VoIP monitoring.
- Session Border Control Webinar – A multimedia seminar-on-the-web featuring Ditech’s Session Border Controllers being used by Free World Dialup.
White Papers
- Cost-effective Transcoding for Carriers –
An introduction to the growing suite of VoIP codec standards and the benefits of codec transcoding in today's VoIP networks.
- Voice Quality beyond IP QoS – How VoIP call quality should be understood as the sum of all aspects of the voice experience, not just packet delivery.
- Practical Far-End NAT Traversal for VoIP –
A review of the plusses and minuses of today’s far-end NAT traversal solutions.
- The Impact of Packet Voice Transport on Network Echo Cancellers –
The effect of VoIP-converged networking on echo and echo cancellers.
- The Impact of Environmental Noise on Customer Experience in GSM and CDMA Networks –
A look at environmental noise and its effect on quality in GSM and CDMA networks.
- Testing Wireless Voice Quality: Capturing the Customer Experience – Going beyond RF and codec testing to measure how the customer experiences the actual conversational call quality.
We will request that you fill out a simple sign-in form before accessing Ditech’s webinars and white papers.

