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"The big problem with interference from winlink users is the modem they have chosen to use. It was originally designed for commercial radio services that are channelized. If the signal detection listens in the 500 Hz PACTOR 1 channel and it is not busy, then the whole channel is free and you can use it however the modem deems fit."[http://forums.qrz.com/index.php?threads/should-winlink-be-illegal.135739/ WA2DTW says], "It is difficult for me to understand how a mode can be legal if it a) can allow automatic transmission without an operator being in total control, listening for possible QSO's and taking skip zones into account b) can relay internet sites, including commercial material c) is not easily decoded by any listener. "KC7GNM states, "I believe that amateur radio should be used by amateur radio operators and not become a third party commercial email service. Winlink is just one example of the misuse of the amateur radio spectrum by third parties."