发明名称 |
Step-by-step remote locating system for repeaters in a PCM link |
摘要 |
A step-by-step remote locating system for a digital bidirectional transmission link includes repeater pairs between a monitoring end equipment and a remote equipment. The monitoring equipment transmits remote location sequences and a locate end interruption on a forward channel. The sequences are intended to command closing and opening respective loop-back paths between two repeaters of the pairs. Each sequence comprises a predetermined integral number k of nonconsecutive interruptions in a transmitted digital signal throughout a predetermined period and, with the exception of the first sequence, an interruption preceding the k interruptions intended for opening the loop-back path of the preceding pair. The remote locate circuit associated with each repeater pair comprises an interruption counter. When the count of the counter is k the respective loop-back path to the monitoring equipment is closed. When the count is not equal to k, the loop-back path is opened. The count of the counter automatically returns to zero in response to a count less than k at the end of the predetermined period or in response to a locate end interruption longer than the predetermined period.
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申请公布号 |
US4402075(A) |
申请公布日期 |
1983.08.30 |
申请号 |
US19810277101 |
申请日期 |
1981.06.25 |
申请人 |
SOCIETE ANONYME DE TELE COMMUNICATION |
发明人 |
BARGETON, GILBERT L.;BEYNIE, CLAUDE P. |
分类号 |
H04B17/02;(IPC1-7):H04B3/46 |
主分类号 |
H04B17/02 |
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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