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发明名称
摘要
<p>PURPOSE:To improve circuit efficiency in use and conference efficiency, by discriminating a speaking point at the multidestination connection center, by automatically switching images, and by transmitting the image to other destinations.</p>
申请公布号
JPS5932024(B2)
申请公布日期
1984.08.06
申请号
JP19770035612
申请日期
1977.03.30
申请人
NIPPON TELEGRAPH & TELEPHONE
发明人
YAMAGUCHI TAKESHI
分类号
H04M3/00;H04M3/42;H04M3/56;H04N7/14;H04N7/15
主分类号
H04M3/00
代理机构
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