MADRID, 25 Jun. (Portaltic/EP) –
Just 3 percent of calls to landlines with voice over IP (VoIP) are answered, and the vast majority come from automatic response systems, according to an investigation with more than 56,000 calls made in Finland.
Finnish cybersecurity expert Valtteri Lehtinen has conducted a total of 56,874 calls in 40 days with the aim of exploring the fixed telephone network, especially automated systems, as Shuffling Bytes has posted on his blog.
Among its results, the research carried out by Lehtinen has shown that of the total calls, only 3 percent of them (1,724 calls) got a response.
From the answers, the majority came from machines (1,457 calls, 85% of the responses), and the rest, 247, were people who answered. By the type of response received, most were businesses (236), and only eleven individuals.
The study was carried out through a technique known as ‘war dialing’ which consists of calling numbers in a massive way to discover interesting information, and which is carried out through a physical device connected to a voice over IP network. The recordings of the answered calls were analyzed manually.
The landlines called in the study do not include ‘premium’ service numbers, nor do they include private individuals, as only the numbers that pay for high rates for voice over IP were analyzed included in a list drawn up by the Finnish administration.
Only 2 percent of the total calls (1,182) are considered “interesting“For the researcher, within his purpose of analyzing the systems of the telephone network, and only 74 of them were” interesting unique answers “.
Among these interesting calls answered by machines, seven of them answered a fax and another eleven, music, while from calls put on hold, five of them were test numbers, 33 were voice answering machines and 31 were teleconferences.
The rest were classified as unknown, and 1,074 calls asked the user to provide an access code to access a service. Another call reported the status of a nuclear power plant.