VOIP also has sound quality and reliability problems. Data sent across the Internet usually arrives at its destination scrambled. E-mail and documents can be reassembled in the correct order when it arrives. Voice data also arrives scrambled, but it's more complicated because of the real-time nature of VOIP. Some data packets may have to be dropped when they don't arrive in time, in order to make voice connections with the least delay. This can cause brief silences in the audio stream.

Distance and speed of the connection determine the amount of data lost. Some networks receive more traffic and thus are more likely to cause audio dropouts. One way to provide high quality audio connections is to create dedicated data paths.

With the incredible amount of work dedicated to VOIP, these disadvantages will no doubt be resolved within the next 2 years. It is expected that by then VOIP will have widespread consumer acceptance.

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