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PSTN �넻�솕�웾 湲됯컧 'VoIP�궗�뾽�옄�뿉 遺덈삦'
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237 tech 2010-03-26 45924 
�씤�꽣�꽬�쟾�솕(VoIP)�쓽 �솗�궛�쑝濡� �쑀�꽑�쟾�솕(PSTN) �넻�솕�웾�씠 留ㅻ뀈 吏��냽�쟻�쑝濡� �겙 �룺�쓽 
媛먯냼�꽭瑜� �씠�뼱媛� �쟾留앹씠�떎. 

[湲곗궗�쟾臾�] http://www.etnews.co.kr/news/detail.html?id=201003250299

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