发明名称 |
Service integrated communication transmission and interchange system |
摘要 |
A service integrated communications transmission and switching system for audio, video and data, between a user terminal and a central switching station of a telephone system wherein the line connecting the user terminal with the switching station includes at most one light-conductive fiber which is utilized in wave multiplex duplex operation for the transmission and reception of signals from and to the user terminal; the narrowband services are provided by means of digital transmission with analog to digital and digital to analog conversion and multiplex and demultiplex taking place at the user end; and the broadband services are provided by means of analog transmission.
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申请公布号 |
US4441180(A) |
申请公布日期 |
1984.04.03 |
申请号 |
US19800155132 |
申请日期 |
1980.05.30 |
申请人 |
LICENTIA PATENT-VERWALTUNGS-GMBH |
发明人 |
SCHUESSLER, HANS |
分类号 |
H04B10/00;H04B10/12;H04B10/22;H04H20/81;H04M11/06;H04N7/22;H04Q3/52;H04Q11/04;(IPC1-7):H04B9/00 |
主分类号 |
H04B10/00 |
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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