发明名称 |
Hookswitch bounce resistant telephone hold-mute circuit |
摘要 |
A hold circuit for use with a single line telephone operable over long or short telephone loops. The included circuit during response to the momentary operation of a manual switch actuates a silicon controlled rectifier to place a resistive load across the telephone line thus allowing the subscriber at the telephone instrument to go "on-hook". Subsequent removal of the basic instrument handset from the hook-switch, or of a related extension telephone going "off-hook", will cause the resistive load to be removed.
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申请公布号 |
US4517414(A) |
申请公布日期 |
1985.05.14 |
申请号 |
US19830560623 |
申请日期 |
1983.12.12 |
申请人 |
GTE COMMUNICATION SYSTEMS CORP. |
发明人 |
BOECKMANN, EDUARD F. B. |
分类号 |
H04M1/80;H04M3/428;(IPC1-7):H04M1/00 |
主分类号 |
H04M1/80 |
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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