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http://www.okay.dyndns.org/okhp/linux/asterisk
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http://openmbd.redirectme.net:8000/verona
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http://www.engadget.com/entry/1234000770044260
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http://tapioca-voip.sourceforge.net/wiki/index.php/Tapioca
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http://www.voip-info.org/wiki/view/Sipura
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http://sipath.sourceforge.net/weblinks.php
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http://changelog.complete.org/node/375
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http://www.sip-communicator.org
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http://www.divmod.org/Home/Projects/Shtoom