| 发明名称 |
Telephone station set interface circuit |
| 摘要 |
A telephone station set interface circuit is disclosed which enables a conventional nonkey telephone station set to be used in place of an electronic key telephone station set for those subscribers in an electronic business communication system requiring only a call origination and a call reception capability.
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| 申请公布号 |
US4088844(A) |
申请公布日期 |
1978.05.09 |
| 申请号 |
US19760752743 |
申请日期 |
1976.12.21 |
| 申请人 |
BELL TELEPHONE LABORATORIES, INCORPORATED |
发明人 |
KINNAIRD, JR., RICHARD CLYDE |
| 分类号 |
H04M11/06;H04M1/00;H04M9/00;H04M11/00;H04Q3/58;(IPC1-7):H04M1/72 |
主分类号 |
H04M11/06 |
| 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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