What is voice over ip

What is voice over ip

All you need to know about VOIP


VoIP , or VoIP (Voice over IP) is a technique for communicating orally over IP-enabled networks , whether private networks or the Internet. , wired (cable / ADSL / optical) or not (satellite, wifi, GSM) . This technology is most often used to support.

How is the voice transported?

The transport of voice over IP is relatively complicated. The first step is the digitization (coding) of the acoustic signal. Then, the information is divided into frames (blocks of information) that can circulate on a computer network. Many protocols can then be used to route the information to the recipient (s).

How is the voice coded?

In a conversation, the voice produces sounds at different frequencies .

Thanks to these constant frequency changes, we perceive emotions and intonations. This multitude of frequencies would be remarkable by a sinusoidal display if one visualized his signal on an oscilloscope.

The voice causes a sinusoidal signal, which is analog . However, to pass it over a TCP / IP (Digital) network, it will be necessary to convert this signal (analog to digital) in PCM (Pulse Code Modulation) format to 64 kb / s.

Once converted, it is necessary to compress the voice (digitized) through a codec (Compressor / Decompressor) to insert it into an IP packet. This coding must offer the best possible voice quality for the lowest bit rate and compression delay possible. There are several coding techniques that are measured in a completely subjective way.

The method of broadcasting Voice over IP:

The term "VoIP" is generally used to describe " point-to-point " communications . For the broadcast of sound or videos over IP in multipoint mode , it is more about streaming for a simple broadcast, as used by web radio for example. The term multipoint is rather reserved for videoconferences.

Globex Teleccom technique can be done in unicast mode (a transmitter and a receiver), broadcast (a transmitter and all receivers without exception) or multicast (a transmitter and several receivers) on networks .

Voice over IP leads to the replacement of traditional telephones with "IP telephones" whose characteristics are:

  • Replacement of telephone jacks (RJ11) with network jacks (RJ45).
  • Replacement of analog or digital interfaces of telephones with the network through an IP protocol interface .
  • The replacement of the traditional telephone signaling protocol by an IP voice system.
  • The replacement of the handset by a new handset having the above characteristics, or by software that can be installed on a computer (with a headset and a microphone).


An IP voice infrastructure may be available for the same availability zones as traditional telephone systems:

  • In a closed way ( Intranet ): by the use of a private IP central office .
  • In a semi-public way ( Extranet ): by sharing an IP central office with its partners or customers (via a VPN for example = extension of the local network).
  • In a public way but limited (Internet): by an opening on the Internet of the central IP.
  • In a public and open way (Internet): by an opening on the Internet of the central IP and the affiliation of gateway (s) towards the PSTN network .

Popular Right Now

Deadlines Are Not Important

The Deadlines Of Life Do Not Mean As Much As You Think


Deadlines are not important; the deadlines for work, school, and things related to that, those are important. Life's deadlines are not important. Society tells us that we must be married, have the perfect job, and have children by a certain age. A lot of the times we end up believing that if we do not do certain things by a certain time, we have failed or we are not doing as good as everyone else. The truth is, society's and life's deadlines are crap. There is no specific time to be married by, no specific time to have your perfect job by, and no specific time to have children by. These things should not be accomplished until you are ready and capable to accomplish them; this means that if you are not 50 until you have your perfect job, you are not 30 until you are married and you are not 40 until you have children, that is okay. There is nothing wrong with waiting, experiencing life, growing in who you are, and doing what you need to do first. A lot of people do not have their perfect job until later in life because if we are all honest here, that is one of the hardest things to figure out and hardest decisions to make. People stress so much because they have not met these certain deadlines of life that they have been told their entire lives they need to meet by a certain time. So often, the important things like a job, a marriage, and children are rushed and people end up miserable. There is no sense in rushing if you are not ready for it yet. When it comes to finding the perfect job for you, look around, find your interests, and figure out what you can spend years of your life doing; take your time and be patient. When it comes to marriage and having children, do not rush it, it is one of the worst things to rush; do it in the time frame you want to and make sure it is what you want. Take a deep breathe and stop freaking out; you have plenty of time. Instead of going by society's and life's deadlines, go by your own and base that off of your capabilities and your wants.


Related Content

Connect with a generation
of new voices.

We are students, thinkers, influencers, and communities sharing our ideas with the world. Join our platform to create and discover content that actually matters to you.

Learn more Start Creating

A Complete Guide on How to Enjoy Divinity in Zagreb, Croatia?



Among many European countries, Zagreb is considered one of the hottest countries in the world. It is a destination where not many tourists go but if they decide to go, they make sure of managing everything in advance – which places to visit, how to visit, and when to visit are some frequently asked questions.

In this article, we have gathered enough information for all those who are about to travel to Zagreb for the first time. As it is the first time only when a tourist feels insecure and quite hesitant in hiring services.

Let's figure out what we need to know prior delving into other aspects. First and foremost, it is about the route you need to take, rent a car service, and place to spend your days. Secondly, it is about their integrities as in further details which might not be required to know in this article.

Where to go to Zagreb?

Following are some areas which are a must to go in Zagreb. Reason being they are the best tourist spots which are profoundly known for their landmarks.

1. St. Mark Cathedral

2. Lotrscak Tower

3. Ljubljana

4. Plitvice National Parks

5. Zagreb Airport

How to go to Zagreb?

Now, the question arises as to how one can go to Zagreb. Is it just through rental pick and drop services? Or do we have other options too? Well, the answer to it is simple: traveling across Zagreb is possible through hiring Auto Europe rental car service. It works with hundreds of drivers and customers with the utmost quality. A number of pickup locations make the visit to Zagreb easier by picking the tourist from the airport and taking them to the hotel. From hotel to the fixed tourist points is another task assigned to these rental car service chauffeurs. Everything is preplanned and at times decided on the spot.

What services to render for traveling to Zagreb?

This company is best in providing all you may need in a good rental car facility. Having said so, it complies best and affordable prices which mostly come in the form of a package. Moreover, each and every trip to Zagreb with Auto Europe is full of excitement and a new car. It helps in maintaining and stabilizing business of the rent a car globally. For instance, in summers, they offer sportscar which totally puts a customer in a state of awe; and in winters SUV is rented for climbing up the mountains.

Last verdict:

In short, cars matter the most and renting a car from this particular company, one tends to have a fun-filled, amazing, and full of memories kind of a trip.

You and I, all those who want to visit Zagreb, must explore the place with the right rent a car service. In this case, rent a car from Zagreb and visit other campsites in the pitches and patches of mountainous, natural, and epic areas.

Related Content

Facebook Comments