One more kind of an IP-telephony all happy owners of the computer connected to the Internet can use. Operators offer some variants of connections: calls from the computer on the computer, from the computer on stationary or mobile phones worldwide and calls from phone on the computer.
There is also such service, as vocal mail and readdressing of calls. The IP-telephony involves clients with the price. Calls from the computer on the computer do not stand in general anything, the user pays only the usual iternet-traffic in habitual volume, and at connection with telephone sets tariffs of IP-operators approximately on 40-50 % are cheaper than calls through "eight".
To use IP-telephony services, it is enough to download the special program, to establish it on the computer and to pay depending on the chosen tariff. It is possible to fill up balance by means of special maps of activation, same what are used for cellular communication fee.