In the past, when you call an office building or business, you would either be transferred to the department you want to talk to, or given their extension number. This extension is usually a 2-3 digit code that when dialed, transfers you automatically to the particular person or department you want to speak with. The reason why this code works is because it is programmed into a PBX system.
Company Alphatalk Communications (HongKong) is created in 2001. The basic purpose of the company - development of a perspective direction of transfer of the traffic between Russia and the countries of the Asian region.