发明名称 |
Arrangement for subscriber line ring testing |
摘要 |
An arrangement for automatically testing a plurality of subscriber lines, which are operationally connected to an electromechanical switching system is shown. Operational service is to be transferred from the electromechanical switching system to a digital switching system. This arrangement provides for automatically verifying whether the digital switching system is arranged to apply the proper ringing signal to each subscriber by a comparison with that applied by the electromechanical switching system.
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申请公布号 |
US4544809(A) |
申请公布日期 |
1985.10.01 |
申请号 |
US19830563737 |
申请日期 |
1983.12.21 |
申请人 |
GENERAL TELEPHONE OF MICHIGAN |
发明人 |
STUPARITS, JEFFREY J.;CRAMER, RUSSELL L. |
分类号 |
H04M3/30;(IPC1-7):H04M3/26 |
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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