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发明名称
IDENTIFICATION SYSTEM FOR OPERATING AND NONOPERATING TRUNK IN EXCHANGE
摘要
申请公布号
JPH0396157(A)
申请公布日期
1991.04.22
申请号
JP19890234282
申请日期
1989.09.08
申请人
NEC CORP;NEC TOHOKU LTD
发明人
ONIMARU FUMIO;ONODERA AKIRA
分类号
H04M3/22;H04M3/32
主分类号
H04M3/22
代理机构
代理人
主权项
地址
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