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Unclear sound in VoIP? Discover the Causes and Solutions

Unclear sound in VoIP Systems?
Discover the Causes and Solutions to Enhance Call Quality

The sound quality of VoIP systems is fundamental to ensuring professional and effective communication within any organization, as call clarity and stability make the difference between a professional call and one full of technical challenges.
The role of VoIP service providers does not stop at sales only, but extends to technical guidance, accurate installation, continuous software updates, and providing after-sales services to ensure an optimal user experience.
Despite this support, sound quality challenges in VoIP systems remain the most prominent issue that can affect Internet-based communication systems and VoIP service providers.

How can call quality issues in VoIP systems be resolved?

Key steps to improve call quality over Voice over Internet Protocol (VoIP)

First: Choosing specialized routers:

It is not recommended to rely on standard or home-use routers in VoIP systems and professional business places.
These types of routers are not expensive, but they play a crucial role in call stability.
It is recommended to use a router:

  • Supports QoS feature that prioritizes voice packets (Prioritizes VoIP Traffic).
  • Supports SIP protocol, which plays an important role in delivering data between the client and server quickly and reliably.
Second: Ensuring the stability and quality of the internal network:

Before considering the internet or service provider, it is essential to ensure that the internal network is functioning properly.
Any issues with network cables, switches, or data loss within the local network will directly affect the audio quality of VoIP systems, causing problems such as call drops or voice delays.
Therefore, the network infrastructure must be checked to ensure that it is operating efficiently and error-free.
A stable internal network means a solid foundation for clear voice calls.

Third: Fine-tuning Codec Settings:

The term “Codec” is short for the processes of encoding and decoding (Compressor-Decompressor or Coder-Decoder). It is an algorithm used to convert audio from one format to another (compressed digital data) in order to reduce its size and facilitate transmission over the Internet or internal network.
Choosing the right codec has a direct impact on the sound quality of VoIP systems.
This is why most VoIP service providers prefer using the G.711 codec, as it offers high-quality audio.
Using an inappropriate codec may lead to:

  • Slow audio transmission
  • Poor call quality
  • Complete audio dropouts

It is also essential to ensure that all devices within the network support the same codec, as incompatibility between devices will prevent audio transmission entirely.

Fourth: Checking and Monitoring Internet Speed:

When using the internet to carry calls or connect company branches, the efficiency of communication and call quality depend directly on internet speed and service provider reliability.
Any internet slowness or instability will immediately affect the call quality of VoIP systems.

  • Call quality using G.711 Alaw codec requires a speed of approximately 8.7 kbps for each call.
  • Internet usage within the organization must be managed, and personal activities (such as downloading large files or streaming media) should be restricted, as they consume bandwidth and negatively impact voice clarity and call quality.
Fifth: Conducting Regular Internet Connection Quality Tests:

In cases of networking between different company locations or branches, it is necessary to conduct regular tests to measure the quality of connection between branches, particularly in terms of:

  • Packet Loss
  • Data transmission speed and stability

The higher the packet loss rate, the more it negatively impacts the quality of voice calls.

Sixth: Setting up a firewall and security software:

Sometimes audio issues are caused by firewall settings.
To achieve the best sound quality in VoIP systems, it is essential to ensure that:

  • The firewall does not block the ports used for voice transmission and allows data to pass through them, meaning they are open.
  • These ports are not subject to inspection or filtration, as this may cause sound delays or interruptions.

Improving call quality in VoIP systems does not always require complex solutions, and call quality issues in VoIP systems do not necessarily indicate a complicated malfunction. It starts with simple steps such as adjusting the network, choosing the right codec, providing adequate internet speed, and using audio-specialized equipment.

By applying these tips, call quality issues can be significantly reduced and provide a stable and reliable communication experience for customers.

Telsip — an all-in-one cloud communications platform that combines a cloud PBX, a cloud contact center, unified OMNI channels, and a WebRTC-powered softphone, with seamless CRM integration and professional support; it delivers intelligent call management, unified conversations, and real-time reports that enhance your team’s efficiency and your customers’ experience.

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