Open-up the IP-Telephony For Dummies: What It Is, How It Works

Open-up the IP-Telephony For Dummies: What It Is, How It Works

In addition, recently such cases have become frequent when subscribers of traditional networks receive invoices of incredible size for services that the latter did not use. To avoid such incidents, you can completely disconnect the possibility of long distance communication and leave yourself without communication.

Making the telephone conversations through the Internet protocol help to protect yourself from attacks by intruders and not limit communication.

This version of communication appeared relatively recently and it is gaining more and more admirers today.

Features of VOIP (IP-telephony)

What are the features of  VoIP telephony? The main features of VoIP telephony are as follows – fast, relatively inexpensive way to transfer the data, such as voice, video, text over the internet. In VOIP we consider mainly the transfer of voice over the web networks.

What is VOIP (IP-telephony)?

VOIP or IP-telephony is the process of connecting the subscribers via the Internet, using various protocols. For the newbies, the details of the organization of services are not needed. The main thing is that the connection is qualitative and inexpensive. We only note that two main protocols are now used:

  • SIP – the most popular, provides mobility of users with saving of their number;
  • IAX2 – provides a more reliable and high-quality communication, but more complicated in the implementation has a weak defense against hacker attacks.

Using modern protocols one can significantly save traffic, besides the different mobile devices, applications can operate based on them.

Their users receive the following advantages:

  • Making voice calls;
  • Connection of subscribers by means of video communication;
  • The transfer of multimedia information, the exchange of various files;
  • Text messaging;
  • The ability to play online games.

The communication between the subscribers is carried out through the Internet. Calls to landline phone numbers are processed using special gateways.

The bulk of VOIP operators (IP telephony) provides services through SIP because it is easier to maintain and organize.

How does the communication work?

The features of using protocols are often not of interest to ordinary users of such services. Let’s explain for dummies, how the connection works. Let’s analyze the algorithm of connecting two subscribers as much as possible:

Both devices must be connected to the Internet and maintain a connection with the selected operators.

When the first subscriber dials the internal number of the second – the servers find his location, send him a signal.

If the second subscriber accepts the call, the connection will be established.

Communication is via the Internet, traditional telephone networks are not involved. Therefore, tariffing is based on the spent traffic.

How much do Internet telephony services cost?

Having seen an unfamiliar abbreviation and unusual terms, most users are lost without understanding what it is. However, communication through the Internet is becoming more popular, millions of subscribers already use it daily.

To save money and please yourself with these services, you must be a subscriber of one of the IP-operators. It is interesting that communication with subscribers of one provider is not charged. Interlocutors need only pay for the traffic spent on the connection.

Thus, if you have unlimited Internet and connect your phone to the Internet through wi-fi, calls will be absolutely free.

The charging of international calls is also much lower than that of operators of traditional telephone networks. The cost of a normal connection depends on the distance between subscribers. Since distance is not of fundamental importance for the Internet, the international tariffs for connecting to subscribers outside of one provider seem to be negligible.

Popular SIP operators

To communicate using an IP-phone, you need to become a subscriber of one of the IP-telephony operator. Such networks are of general use, all interested persons can connect to it, either closed, intended, most often for corporate communication, available only to a limited number of subscribers (PBXs, remote offices with the central office). Such closed networks, although working on an IP-based protocol, may not be connected to the Internet at all. Therefore, it will only deal with public networks.

Today, a large number of networks using IP telephony. The most famous are Skype. Communication between subscribers of the network is free, regardless of their distance from each other. Communication between users of Skype and traditional telephone networks is also insignificant, in comparison with the tariffs of usual automatic telephone exchanges (SkypeOut service). The only drawback of the operator can be attributed the possibility of paying for services solely by electronic money, certain types of bank cards.

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