The principle of this type of communication is that the human voice is converted into digital packets that are then transmitted via the Internet to anywhere in the earth. It is worth noting one of the most important advantage of IP telephony, which is that it does not matter where in the moment the user is. Absolutely all phone calls can be made from any suitable place and it is completely free.
The main advantages of IP telephony can be attributed to the fact that it can help us to implement things which you cannot do when communicating via the standard telephone network. For example, users have the ability to create conferences, call forwarding, automatic number identification, etc. in addition, all this is provided absolutely free of charge, and in the case of using the conventional telephone network, some of the above services, the provider requires a certain fee. Due to this, the use of IP-telephony in most cases, it is better than conventional telephone network.
How to call on VoIP?
For making calls through IP-telephony does not require any additional software. The user only need a telephone with tone dialing. Call via IP-telephony is almost the same as regular calls. The user need to dial a city telephone number, and then switch the phone to tone mode. Depending on the model you have to press "*" or "Tone". After phone will work in this mode, you must enter the pin code. If the user has no pin, then you need to enter the "personal code" and press "#".
As a result, the user must wait for a response directly from the system itself and for 25 seconds to dial the number. A call to Russia or Kazakhstan in the following manner: 8- (city code) - (subscriber's number), and then "#". For international dialing dial: 8-(10)-(country code)-(city code)-(phone number), and then "#".
After one of these commands is executed, the user will be connected to another subscriber through an IP-telephony. Immediately after the conversation with the caller will be charged a specific amount spent on the conversation. The final amount will be billed according to the tariff of the company, which was awarded the corresponding contract.