发明名称 |
Method and apparatus for performing impedance measurements on a communication line |
摘要 |
A network termination unit for connection to a telephone line at a predetermined demarcation point for sequentially simulating a plurality of fault conditions to allow a diagnostic routine to be performed on the telephone line at a remote location from the demarcation point. The network termination unit comprises a plurality of semi-conductor switches electrically connected to conductors of the telephone line to establish a network of electrical paths capable of altering the electrical condition of the telephone line when caused to assume a state of conduction. A logic module causes the switches to assume either a closed or an opened condition in accordance with a predetermined sequence established by a hard-wired program.
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申请公布号 |
US5661776(A) |
申请公布日期 |
1997.08.26 |
申请号 |
US19950468188 |
申请日期 |
1995.06.06 |
申请人 |
ATLAS TELECOM INTERNATIONAL LTD. |
发明人 |
CHARLAND, CLAUDE |
分类号 |
H04M3/30;H04M3/32;H04M19/08;(IPC1-7):H04M1/24;H04M3/22 |
主分类号 |
H04M3/30 |
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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