发明名称 |
SPOSOB PRZESYLANIA SYGNALOW W UKLADZIE TRANSMISYJNYM TELEFONICZNYM I UKLAD TRANSMISYJNY TELEFONICZNY |
摘要 |
The cut-in appts. is operative between a two-way subscriber channel working with analogue signals and digital equipment, esp. - subscriber circuit for telephone installations with digital coupling fields. A coder is provided that converts analogue into digital signals. Its output terminals are connected to a clamping device. The latter selectively suppresses the coder output signals by subtraction of unwanted signals in digital form. - The output terminals of the clamping device are coupled to the digital equipment. A decoder converts the digital signals of the latter into analogue signals. The decoder output is connected to a summing circuit.
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申请公布号 |
PL205022(A1) |
申请公布日期 |
1979.02.12 |
申请号 |
PL19780205022 |
申请日期 |
1978.03.02 |
申请人 |
INT STANDARD ELECTRIC CORP |
发明人 |
TREIBER ROBERT |
分类号 |
H04B3/20;H04B1/58;H04B3/23;H04M1/76;H04M3/00;H04Q3/00;H04Q3/24;H04Q3/42;H04Q11/04;(IPC1-7):H04M/ |
主分类号 |
H04B3/20 |
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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