发明名称 |
Telephone ringing generators |
摘要 |
A single channel carrier system for telephone service is disclosed including a remote terminal having a battery charger for charging a battery during idle periods to power the remote carrier electronics. The remote electronics include a ringing generator and supervisory circuits to implement normal telephone supervision over the carrier channel.
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申请公布号 |
US4015091(A) |
申请公布日期 |
1977.03.29 |
申请号 |
US19750638151 |
申请日期 |
1975.12.05 |
申请人 |
BELL TELEPHONE LABORATORIES, INCORPORATED |
发明人 |
RAO, TADIKONDA NARASIMHA;TOUMANI, ROUBEN |
分类号 |
H04M3/02;H04M19/04;(IPC1-7):H04M1/26 |
主分类号 |
H04M3/02 |
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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