发明名称 |
Private branch exchange capable of adding a calling station ID number to the call signal |
摘要 |
A private branch exchange includes a detector that detects a transmission request to an external line by an extension terminal. An identifying circuit identifies the direct inward dialing number of the transmitting extension terminal and a transmitter transmits the direct inward dialing number of the transmitting extension terminal that is identified by the identifying circuit to the external line.
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申请公布号 |
US5475744(A) |
申请公布日期 |
1995.12.12 |
申请号 |
US19940324491 |
申请日期 |
1994.10.18 |
申请人 |
CANON KABUSHIKI KAISHA |
发明人 |
IKEDA, NOBUHIRO |
分类号 |
H04Q3/58;H04Q3/62;(IPC1-7):H04M15/00;H04M1/56;H04M3/42;H04M7/00 |
主分类号 |
H04Q3/58 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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