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http://www.atosc.org/pipermail/osip/2006-November/007190.html
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http://rfc.net/rfc3840.html
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http://rfc.net/rfc3841.html
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http://www.linux.com/feature/127501
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http://www.sciencedirect.com/science?...;md5=e319e7e3971b6f9cc9bed2b1729e0dd6
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http://events.ccc.de/congress/2007/Fahrplan/events/2256.en.html
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http://www.sip-communicator.org
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http://www.linksys.com/servlet/Satell...FVisitorWrapper&lid=4178586843B01
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http://www.twinklephone.com