发明名称 |
Dual timing circuit for telephone subscriber's instrument |
摘要 |
A dual timing circuit for use with a subscriber's telephone circuit operated in response to two manual switch operations to simulate the placement of the subscriber's phone in the "on-hook" condition for two different predetermined periods of time. One "on-hook" period being for the operation of transfer circuitry in an associated PABX and the other period being for the initiation of a new call.
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申请公布号 |
US4492823(A) |
申请公布日期 |
1985.01.08 |
申请号 |
US19830490770 |
申请日期 |
1983.05.02 |
申请人 |
GTE BUSINESS COMMUNICATION SYSTEMS |
发明人 |
JAMES, MIRANDA L.;TEATER, ALBERT |
分类号 |
H04M1/53;(IPC1-7):H04M1/00 |
主分类号 |
H04M1/53 |
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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