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经营范围
发明名称
LINE SWITCHING SYSTEM
摘要
申请公布号
JPH03229536(A)
申请公布日期
1991.10.11
申请号
JP19900023761
申请日期
1990.02.02
申请人
NIPPON TELEGR & TELEPH CORP <NTT>
发明人
OKAMOTO TSUKASA;SATO SUNAO
分类号
H04L1/20;H04L1/22
主分类号
H04L1/20
代理机构
代理人
主权项
地址
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