VoIP-telephony at home

You are still using the “eight” to call the toll? Maybe you and text typed on a typewriter “Remington”? What? Buy card IP-telephony? The last – it’s closer to our enlightened time. But what all the fuss is ridiculous, when anyone with a computer connected to the Internet can taste all the good personal VoIP-phone, not getting out of the cozy depths of the easy chair.

VoIP (Voice-over-IP) – the communication system, providing the transmission of voice signals over the Internet or any other IP-based networks. The signal is transmitted over a communications channel in a digital form and converted before transmission and compressed. Usually calls through VoIP, especially long-distance and international, is much cheaper than conventional or cellular. This is because the transmission of voice traffic over the Internet much cheaper than mobile network, Internet connection, much cheaper than laying and connection of the telephone line. Moreover, while VoIP is considered as an information service and therefore exempt from taxation, which allows providers to VoIP-connection establish low rates are not at a loss. Shikorokopolosny Internet access to use VoIP-telephony is not required, enough speed to 64 kb / c.

Currently, there are some basic standards for working with VoIP and the huge number of codecs used for voice transmission. The most common is the open standard SIP (Session Initiation Protocol). It is used by most VoIP operators around the world, and under him zillions of so-called softofonov – programs used to communicate through VoIP.

Approximately equal in prevalence can safely assume a closed standard Skype, created by the developers of Skype-based networks P2P. There are several private or proprietary protocols, but they are less common. Typically, each provider uses a private communication protocol has its own client software that is incompatible with the others. With them and begin a review. Learn more about voice over ip.

Skype
Compatible Systems: Windows 2000/XP/Vista
Language: Russian
Availability of information: there
Distribution Type: freeware
Size: 21.3 MB
Program website
Download

The most famous and popular client for VoIP-telephony. It is safe to say, “There is Skype, and there are all the others,” and you can not go wrong. Such isolation has arisen due to the protocol P2P (from the English. Peer-to-peer) to use the service. P2P – version of the computer network in which there are no dedicated servers, and each user (peer) is both a client and server simultaneously. In addition to actually call Skype allows you to exchange messages, organize chats, both text and voice, transfer files, set video and has a voice mail with voice mail. Calls between computers are free to call a mobile or landline phone will have to pay by purchasing credit from 10 euros and up (Skype Credit). In addition, you can purchase a monthly subscription, which will allow him to call without any restrictions on the phones in 34 countries (Subscriptions). In addition you receive your virtual phone number that callers can call regular phone networks. Unfortunately, Russia is not one of those countries. Paid subscriptions and Skype Credit credit cards Diners, MasterCard and Visa, vouchers sold online stores or through service Yandex and WebMoney. With prices for telephone calls over Skype can be found on this page. Russia calls on the user cost of 5 cents per minute, to Moscow and St. Petersburg – one and a half cents. Unfortunately, per-minute billing at Skype and will be charged for the connection.

Yahoo! Messenger
Compatible Systems: Windows 2000/XP/Vista
Language: English
Availability of information: there
Distribution Type: freeware
Size: 439 KB
Program website
Download

Another IM-pager with VoIP uses a proprietary codec. More recently, the messenger, like many others, used the SIP for voice traffic, but in April 2008, Yahoo has an agreement with Jajah, which specializes in VoIP-telephony. Now all calls from Yahoo Messenger program will be implemented through a network of Jajah, which has more than 200 points of presence in all regions of the world and uses its own codec. Calls are fairly inexpensive, so the call to the landline phone in the U.S. is 1 cent per minute to landline phone call to Russia from the United States will cost 5 cents, and in Moscow or St. Petersburg is 1.5 cents. More details Rates are available here. For $ 2.49 a month you can buy a phone number, indistinguishable from normal, and take calls on your computer as a regular phone. Paid calls on the credit system: a loan for 10 or 25 dollars you can pay with credit cards Visa, MasterCard or checks American Express. Among other features: short messages, sending messages to mobile phones, checking e-mail. Unfortunately, after the transition to the new protocol calls Yahoo! Messenger from Russia were temporarily unavailable, but not for long. Ukraine, for example, has entered the coverage protocol Jajah.

Starting a conversation about protocol SIP, we first consider a few basic operators, service providers VoIP-connection for this protocol, and then the clients running on it.

SIP-operators

SIPnet

Until recently – the most popular domestic provider, primarily due to the free calls to Moscow and St. Petersburg. Alas, in recent years almost all the advantages disappeared. On February 9, 2008 for all customers – individuals entered service charge account. With any positive account is debited monthly 1 cu – At 0.0333 USD daily. C May 17, 2008 abolished uncharged calls to fixed phones in Moscow, and on May 31 and St. Peterburga. As a result, free calls are only available under the current provider of the shares. After a free registration, you receive a $ 1 per account and can choose a tariff. In Sipnet implemented flexible setup routing: For each area, you can select the preferred and forbidden sites “landing” of traffic on various parameters. Thus, you can adjust the quality of the best connections.

Payment is made by bank transfer, by credit card, payment systems (WebMoney, Yandex, vouchers e-port), through the “Mobile Wallet” Beeline with cell phone and cash at mobile phone stores and payment terminals. Tariffs – per second. Of additional services – detailed statistics of calls, voice mail, “order connections”, allows you to specify two numbers and connect them automatically. Works both with specially sharpened under Sipnet client SippointM, as well as any other.