Nowadays, with the development of the Internet into everyday life of a man breaks into an increasing number of new products and enhancements, coupled with telecommunications technology and communications. All of this is due to the many benefits that accrue to the subscriber, not a matter for which he needed this kind of telephony. Whether it is the private use of telephones or office, in any case, the client receives the highest quality, using local, long distance and international communication, and thanks to cheap cost of routing a call, the customer gets a very flexible and affordable tariff plans.
In addition, users of modern digital telephony are supported by any type of technology, whether Digital Enhanced Cordless Telecommunications (DECT), Wireless Local Area Network (WLAN), Internet Protocol (IP), Time Division Multiplexing (TDM) or Session Initiation Protocol (SIP), functions of a regular phone, and more importantly – the opportunity to transmit voice, video or data. In this case, because if you call with IP-phones is not activated international (national carrier), the cost of such calls is significantly lower than with traditional phone call.
Another important advantage is that – safety. Although most consumers are not IP Telephony but it is relatively easy to install plays such calls, or even change their content, but all are the introduction of VoIP protocol can significantly complicate the interference in the system. In addition, although absolutely secure methods of communication and does not exist, it is in IP telephony which can produce complex multi-level encryption, providing complete anonymity of all VoIP traffic with I2P Network (router software).
But, as in all the results of progress, and here, too, was not without flaws. When using IP Telephony, coding speech information leads to distortion and deterioration of the quality of communication and speech. Experts believe that this happens in case of packet loss at the time of transmission networks or due to slow Internet speed, as well as if it involved potentially exceeding the time required for delivery of a package that carries voice data. All this requires careful work to optimize the delay in the network and algorithms for recovering lost packets.
However, in spite of some shortcomings of digital telephony, it is considered the fastest and most reliable way to send data.