| 发明名称 |
AUTOMATISK SIGNALNIVARELERINGSKRETS FOR EN TELEFONAPPARAT |
| 摘要 |
PURPOSE:To make level control possible with loss-which is not accompanied with distortion-inserted or removed at need, by detecting stably the length of a subscriber's line by utilizing the current which is supplied to a telephone set. |
| 申请公布号 |
SE436239(B) |
申请公布日期 |
1984.11.19 |
| 申请号 |
SE19770012127 |
申请日期 |
1977.10.27 |
| 申请人 |
NIPPON TELEGRAPH AND TELEPHONE PUBLIC CORP |
发明人 |
1)M * YOSHITOSHI;2)I * KAWASHIMA;3)H * KISHIMOTO;4)M * TERAI;5)K * KATO |
| 分类号 |
H04M1/76;(IPC1-7):04M1/76 |
主分类号 |
H04M1/76 |
| 代理机构 |
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代理人 |
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| 地址 |
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