Mobile PVQA Server Sevana

Introduction

In today’s fast-paced digital world, reliable mobile communication is crucial as well as enhancing mobile call quality. Mobile operators are constantly striving to provide their customers with seamless and high-quality call experiences. However, technical challenges such as silent calls, random echo, and short calls can significantly degrade the quality of service, leading to customer dissatisfaction. This case study explores how a leading mobile operator overcame these challenges by integrating Sevana PVQA Server into their existing call quality monitoring system.

The Challenge

The mobile operator in question was facing significant issues with call quality. Customers frequently reported experiencing silent calls, unexpected echo, and abrupt disconnections. Despite having an existing call quality monitoring system in place, the operator struggled to detect and diagnose these specific impairments. The limitations of their monitoring tools meant that many problematic calls went unnoticed, leaving the operator unable to address the root causes effectively.

Silent Calls

Silent calls occur when a call connects, but one or both parties cannot hear anything. This issue can be caused by network problems, faulty equipment, or software bugs. Silent calls not only frustrate customers but also increase the likelihood of them switching to a competitor.

Random Echo

Echo during a call can be highly disruptive. It typically results from network latency or misconfigured equipment. Echo can distort communication, making conversations difficult and leading to a poor user experience.

Short Calls

Short calls, where the connection drops unexpectedly after a brief period, are another significant issue. These interruptions can be caused by network instability, interference, or software errors. Frequent short calls can erode customer trust and loyalty.

The Solution: Sevana PVQA Server

To address these persistent issues, the mobile operator decided to implement Sevana PVQA Server as an additional module to their existing call quality monitoring system. Sevana PVQA Server is a sophisticated tool designed to analyze and monitor voice quality, providing detailed insights into various call impairments.

Implementation Process

The integration of Sevana PVQA Server was seamless and required minimal disruption to the operator’s existing infrastructure. The system began to work alongside the existing monitoring tools, augmenting their capabilities with advanced voice quality analysis.

Identifying Problems

Sevana PVQA Server quickly proved its value by identifying numerous instances of silent calls, echo, and short calls that had previously gone undetected. The system’s detailed analytics provided the operator with precise data on when and where these issues occurred, enabling them to pinpoint problematic areas within the network.

Root Cause Analysis

Armed with comprehensive data from Sevana PVQA Server, the operator conducted a thorough root cause analysis. They discovered that many silent calls were due to faulty network equipment, while echo issues often stemmed from improper configurations in their voice routing system. Short calls were primarily attributed to network instability in specific regions.

Resolving the Issues

With clear insights into the root causes, the operator took targeted actions to resolve the issues. They replaced malfunctioning equipment, reconfigured voice routing settings, and strengthened network stability in identified trouble spots. The proactive measures led to a significant reduction in call impairments.

Results and Benefits

The implementation of Sevana PVQA Server yielded impressive results. The mobile operator experienced a marked improvement in call quality, with a notable decrease in customer complaints regarding silent calls, echo, and short calls. Enhanced call quality monitoring allowed the operator to maintain higher service standards and improve customer satisfaction.

Increased Customer Satisfaction

With fewer call quality issues, customers enjoyed a more reliable and pleasant communication experience. This improvement in service quality helped in retaining existing customers and attracting new ones.

Operational Efficiency

By accurately identifying and addressing call impairments, the operator optimized their network operations. This efficiency not only reduced operational costs but also minimized the time and resources spent on troubleshooting.

Competitive Advantage

The proactive approach to call quality gave the mobile operator a competitive edge. Demonstrating a commitment to high-quality service reinforced their market position and brand reputation.

Conclusion

This case study highlights the critical role of advanced call quality monitoring tools like Sevana PVQA Server in enhancing mobile communication services. By effectively identifying, analyzing, and resolving call impairments, the mobile operator was able to significantly improve call quality and customer satisfaction. This successful implementation underscores the importance of investing in robust monitoring solutions to maintain high standards of service in the competitive telecom industry.

For more information about Sevana and our innovative products, Contact Us.

 

 

AQuA Mobile PVQA QualTest Sevana

Introduction

In today’s interconnected world, reliable voice communication is essential for businesses, individuals, and service providers. Whether it’s a mobile call or a VoIP conversation, ensuring high-quality voice transmission is crucial. Enter Sevana QualTest, a cutting-edge solution designed to evaluate voice quality and network performance. In this article, we’ll explore the features, use cases, and metrics associated with QualTest.

Features of Sevana QualTest

  1. Mobile Test Probe: QualTest serves as a mobile test probe, compatible with Android-powered devices. It seamlessly integrates into both cellular and VoIP networks, allowing comprehensive testing.
  2. End-to-End and Single-Ended Testing: QualTest offers flexibility by supporting both end-to-end and single-ended call testing. Whether you need to assess the entire communication path or focus on specific segments, QualTest has you covered.
  3. User-Friendly Frontend: The intuitive frontend simplifies test setup. Users can specify calling and called parties, reference audio, and devices effortlessly. The frontend also provides real-time insights during testing.
  4. Detailed Reporting and Analysis: QualTest generates comprehensive reports, including overall quality Mean Opinion Score (MOS) over different time periods. It highlights successful and failed test calls, aiding troubleshooting efforts. Additionally, the system can analyze call audio contents using speech-to-text engines.
  5. Compatibility: QualTest works with both rooted and unrooted mobile phones. Analysis can be performed directly on the mobile device or on connected devices (e.g., Raspberry Pi for regular unrooted phones).

Use Cases

  1. Mobile Operators: QualTest empowers mobile operators to monitor call quality across their networks. By identifying bottlenecks and issues, operators can enhance user experience.
  2. Telecom Service Providers: Telecom providers leverage QualTest to assess voice quality in cellular and VoIP networks. It helps them optimize their services and maintain customer satisfaction.
  3. Telecom Solution Providers: Solution providers integrate QualTest into their offerings, ensuring robust voice quality testing for their clients.
  4. Test Engineers: QualTest is a valuable tool for test engineers involved in call quality assessment. It aids in diagnosing network-related problems and optimizing voice services.

Metrics and Analysis

  1. Network Metrics: QualTest measures critical network parameters, including Round-Trip Time (RTT), jitter, and packet loss for VoIP calls. These metrics directly impact call quality.
  2. Mean Opinion Score (MOS): QualTest calculates MOS scores, providing a quantitative measure of voice quality. Users can choose between reference audio or real call audio for MOS estimation.
  3. Waveform Analysis: By analyzing waveforms, QualTest correlates audio problems with network conditions. This helps pinpoint issues affecting voice quality.

Conclusion

Sevana QualTest is a game-changer in the field of voice quality assessment. Its versatility, detailed reporting, and compatibility make it indispensable for telecom professionals. Whether you’re an operator, service provider, or test engineer, QualTest ensures crystal-clear voice communication in an ever-evolving digital landscape.

Note: If you’d like to learn more about Sevana technologies or schedule a call with their development team, feel free to reach out!

Sevana: Contact Us: QualTest

AQuA Mobile Test and Measurement

Sevana AQuA: Promising Audio Quality Assessment for AMR-WB, EVS-WB, and EVS-SWB Codecs

Introduction

In the ever-evolving landscape of telecommunication technologies, efficient audio compression codecs play a pivotal role in delivering high-quality voice communication over limited bandwidth. The quality of audio codecs is traditionally assessed through Mean Opinion Score (MOS) testing, which involves subjective human evaluations. However, the need for automated, reliable, and consistent methods for evaluating codec quality led to the development of Sevana AQuA (Audio Quality Assessment) – a groundbreaking solution capable of differentiating quality based on MOS scores among various codecs, including Adaptive Multi-Rate Wideband (AMR-WB), Enhanced Voice Services Wideband (EVS-WB), and Enhanced Voice Services Super-Wideband (EVS-SWB).

The Significance of Codec Quality Assessment

As telecommunication providers strive to deliver crystal-clear voice quality over diverse networks, codec development has become a critical aspect of ensuring optimal user experience. The efficient utilization of bandwidth, reduction of latency, and preservation of voice naturalness are among the key parameters codec developers aim to enhance. Traditional subjective testing involves a panel of human listeners providing subjective quality scores, often measured by MOS. However, this process can be time-consuming, expensive, and potentially inconsistent due to variations in human perception.

Enter Sevana AQuA

Sevana AQuA represents a paradigm shift in codec quality assessment by leveraging advanced algorithms to automatically evaluate audio quality. The software analyzes audio samples encoded using different codecs, such as AMR-WB, EVS-WB, and EVS-SWB, and assigns them MOS scores based on a robust computational model. This model emulates human auditory perception, enabling AQuA to provide objective and repeatable quality assessments.

Key Features and Functionalities

  1. Objective Quality Scoring: Sevana AQuA employs advanced signal processing techniques and perceptual models to generate objective quality scores for each codec. These scores are highly correlated with human-perceived quality, making them an accurate representation of user experience.
  2. Codecs Comparison: The software enables direct comparisons of codec performance. Telecommunication companies and developers can assess how different codecs perform under varying network conditions, aiding them in selecting the most suitable codec for their requirements.
  3. Scalability and Efficiency: Sevana AQuA’s automated assessment eliminates the need for extensive human listener panels, reducing time and costs associated with quality testing.
  4. Wide Applicability: The software is versatile, accommodating different codecs and network conditions. It can be integrated into the codec development pipeline or used to assess codec performance in real-world scenarios.
  5. Continuous Improvement: Sevana AQuA can be fine-tuned and updated as new codecs are introduced or existing ones are optimized. This ensures that the evaluation remains up-to-date with technological advancements.

Conclusion

Sevana AQuA represents a pivotal advancement in the field of audio codec quality assessment. By offering automated, objective, and reliable MOS scoring for codecs such as AMR-WB, EVS-WB, and EVS-SWB, the software empowers telecommunication companies, developers, and researchers to make informed decisions about codec selection and optimization. As the demand for high-quality voice communication continues to grow, Sevana AQuA plays a crucial role in enhancing user experience across various networks and devices.

Mobile QualTest Sevana Test and Measurement

How to make mobile test call from one mobile phone to another?
Using Sevana QualTest it is easy:

✅Measures quality of mobile calls with regular non-rooted Android phones and iPhones
✅Enables uploads and shares test results
✅Runs both active (with reference audio) and passive tests
✅May be integrated with QualTest Host and correspondent Backend to automate making and receiving mobile test calls
✅Measures quality of mobile calls in the field
Within QualTest one can easily setup these two test scenarios:
🔊 initiate test calls and measure MOS when installed as system application. It is available on rooted phones only. One can view / share / upload test results right from the phone.
🔊 initiate and accept calls without analysis on mobile phone. Rooted phone is NOT required. In this mode application notifies its desktop (Raspberry Pi) counterpart (Qualtest Host, further down QH) about progress of the call. QH handles audio streams via cable adapter and communicates with backend.

5G AQuA Mobile PVQA PVQA Server QualTest Sevana Test and Measurement

 

What are Sevana call quality testing offerings?
We are happy to offer all kinds of tools to test call quality in any network: VoIP, GSM, 5G, satellite
🔹 Vast call quality monitoring both on audio and protocol levels
🔹 Passive real-time and active scheduled call quality analysis
🔹 Call quality problem root cause analysis
🔹 Reliable network and payload MOS
🔹 Mobile-to-mobile call quality tests

5G Mobile Test and Measurement

How well do you know your network?
Do you know that in a packet switched network you may not only rely on ITU-T G.107 E-Model MOS and R-Factor? There are lots of other issues that affect QoE of your subscribers besides typical metrics such as jitter, latency, packet loss, or RTT delay.
Learning about issues “inside” the call gives you a unique chance to detect the issues not necessarily connected with network KPIs.
Ask us how knowing about Silence, Audio gaps, Clipping, Echo and Noise will help you to increase callers satisfaction and prevent their complains.

 

Mobile QualTest Sevana Test and Measurement

Sevana QualTest is a mobile testprobe GSM VoIP application that checks current network conditions and estimates voice quality in mobile and VoIP networks. The platform is designed for end-to-end and single-end call testing, as well as for gathering and analyzing call audio quality metrics. Measure network metrics for VoIP calls and use waveform analysis to correlate audio problems with network conditions.

QualTest mobile test probe is an application for Android-powered devices that can work in both VoIP and cellular networks. A powerful tool for end-to-end and single-ended call testing. Fully functional frontend allows easy set up of tests specifying calling and called parties, reference audio and devices. Reporting shows overall quality MOS scores throughout different time periods, successful and failed test calls and speech-to-text engine provides information on call audio contents. The system works perfectly with unrooted and rooted mobile phones and analysis can be performed as on mobile device itself as well as on the devices it is connected to (e.g. Raspberry Pi in case of regular unrooted phones).