发明名称 |
Toll restrictor for a time division telecommunication system |
摘要 |
A toll restrictor is disclosed for use with a time division multiplex telephone switching system. The restrictor disclosed may serve an entire exchange, the restrictor having digit storage capability for each time slot used. The restrictor is capable of refusing or accepting a first digit and as many as six additional digits in the form of codes. Decisions by the restrictor are made on the basis of conditions programmed within the restrictor apparatus. Calls are completed or not depending on the decisions of the restrictor.
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申请公布号 |
US4046965(A) |
申请公布日期 |
1977.09.06 |
申请号 |
US19760652552 |
申请日期 |
1976.01.26 |
申请人 |
INTERNATIONAL TELEPHONE AND TELEGRAPH CORPORATION |
发明人 |
KONTOMERKOS, ANDREW |
分类号 |
H04M1/677;(IPC1-7):H04M1/66 |
主分类号 |
H04M1/677 |
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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