Internet has been used for many aspects in this life. In this era, people are even using this technology to do a voice call through internet. This kind of GSM gateway can be your solution for you who are bothered by the existence of international tariff for calling. GSM gateway – solution from antrax will make the international call as cheap as local call. This tool is suitable for all GSM frequencies, which makes you easier in doing international call. This is suitable for offices and any other commercial business which need the frequent international calls. So, calling to international destination will not be bothering anymore.