What is VoIP and what is it used for?

In a world where technology is constantly evolving, one question that is increasingly being asked of aspiring entrepreneurs is, "What is Voip telephony and how does it work?" 

This may sound like just another piece of technical jargon, but in reality, VoIP opens up new opportunities for your business by offering a cost-effective way to get a working phone number over the internet In an era where saving money is key, implementing virtual numbers in business is a revolutionary solution to reduce costs without sacrificing call quality.

Although VoIP (Voice over Internet Protocol), has been a part of the communications world for some time now, many are still unaware of its potential and benefits. This is especially important for small and medium-sized businesses, for whom VOIP can be a source of significant savings. 

In this article you will learn:

  • What is VoIP and how does it work?
  • The advantages and disadvantages?
  • How is VOIP different from a landline phone?
  • What equipment is needed for VOIP?

What is VOIP?

VoIP (Voice over Internet Protocol) is a technology that allows voice calls to be made over the Internet, instead of traditional phone lines or cell phones. The essence of VoIP is to convert analog voice signals into digital data, which is then transmitted over the Internet. This allows users to make phone calls from a computer, a dedicated VoIP phone, or a VoIP-enabled smartphone using any internet connection.

How does Voip telephony work?

As stated earlier, it is an advanced technology that transforms audio signals into digital data packets for their subsequent transmission over IP networks. The process involves several key steps that ensure efficient and quality voice transmission over distance.

Digital Voice Conversion:

  • At the beginning of the process, the analog voice signal received through the VoIP device's microphone is converted to a digital format using an audio codec. The codec optimizes the data stream by compressing it for faster transmission over the Internet.

Data packetization:

  • The digital signal is divided into many small segments known as data packets. Each packet is labeled with the digital addresses of the sender and receiver to ensure that they are routed correctly on the network.

Routing packets over an IP network:

  • Data packets are routed over the internet or any other IP network to their destination. Various protocols such as SIP (Session Initiation Protocol) can be used in the routing process to establish a connection between the sender and the receiver.

Reconstruction of the digital stream:

  • At the receiver side, the data packets are reassembled in their original order. An error correction system makes corrections for packet loss or delay, minimizing distortion and skips in the audio stream.

Voice playback:

  • The recovered digital signal is converted back to analog form for playback through the speaker of the recipient device.

Duplex communication:

  • The entire process is done in real-time and in both directions, allowing the participants in the conversation to communicate freely without noticeable delays.

The use of VoIP is not limited to voice communications; the technology also supports video conferencing, file transfer, and text messaging, integrating with a variety of business applications to create multi-channel communication platforms.

Advantages and disadvantages?

Advantages of VoIP:

  • Cost reduction: Significant cost savings compared to using traditional phone lines due to the transmission of calls over the Internet.
  • Superior sound quality: Clear and crisp sound thanks to digital transmission.
  • Flexibility for remote working: Convenient and mobile use for employees anywhere in the world.
  • Advanced communication: Extensive features including call recording, personalized caller ID, and voicemail.
  • Cost-effective international calls: Significantly reduce the cost of international calls.

Possible limitations of VoIP and their solutions:

  • Access to emergency services: Potential difficulties can be minimized by using additional services or mobile as an alternative.
  • Internet dependency: A high-quality and stable Internet connection ensures reliable VoIP performance. Considering alternative connectivity options can serve as a backup plan.
  • Sensitivity to power outages: The use of uninterruptible power supplies (UPS) and batteries ensures uninterrupted system operation.
  • Limited access to help desk services: Many VoIP providers offer solutions to improve access to information and help desk services, as well as integration with local information systems.

With these precautions and solutions in mind, VoIP is a highly efficient and adaptable communications technology capable of meeting the diverse needs of today's businesses and private users.

How is VOIP different from a landline phone?


Fixed telephony

Transmission technology

Transmission of voice over the Internet in the form of digital data packets.

Analog voice transmission over telephone lines.


Cheaper to use the Internet. International calls are cheaper.

More expensive, especially for international calls due to line rental.


Advanced features: video calls, integration with applications, file sharing.

Limited to basic voice communication functions.


High: access from any device with the internet.

Low: tied to a physical location.


Allows you to make and receive calls anywhere over the internet.

Limited to where the phone is installed.


Depends on the quality of your internet connection.

High reliability and stability of communication.

Access to emergency services

May be limited.

Direct access to emergency services.

Energy consumption

Depends on the power supply to the devices and internet performance.

Operates even during power outages due to power from the telephone line.

What hardware do I need for VOIP?

In general, you won't need a lot of hardware, as most systems are purely software-based. However, you should have an analog adapter for your phone, an internet connection, a headset for your computer or VOIP cordless phone, and a router. 


VoIP telephony is a key element in the arsenal of the modern entrepreneur, allowing not only to optimize communication costs but also to significantly expand the possibilities of business communications through the introduction of innovative solutions and integration with other business processes. Choosing VoIP is a step towards a future where flexibility, mobility, and efficiency become the determining factors of success.

Другие наши новости

Get a stable connection from anywhere in the world right now

Thank you! Your submission has been received!
Oops! Something went wrong while submitting the form.