发明名称 |
TEST ARRANGEMENT FOR DATA MODEM |
摘要 |
A data modem is provided with loop-back circuits between the modem transmitter and receiver. If the modem is operating, the loop-back circuits cause oscillations. In addition, the oscillations can also indicate the operating condition of the modem so that adjustments can be made if needed.
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申请公布号 |
US3692939(A) |
申请公布日期 |
1972.09.19 |
申请号 |
USD3692939 |
申请日期 |
1971.04.05 |
申请人 |
GENERAL ELECTRIC CO. |
发明人 |
PATRICK E. KNIGHT;RAYMOND D. STAPLETON |
分类号 |
H04L1/24;H04L25/04;(IPC1-7):H04M11/00 |
主分类号 |
H04L1/24 |
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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