发明名称 |
CALL TRANSFER METHOD AND CIRCUITRY |
摘要 |
<p>CALL TRANSFER METHOD AND CIRCUITRY In the disclosed call transfer method and apparatus, audibly distinguishable ringing signals at a station set enable an answering party to determine whether a received call is either the original call or a previously answered call which is being transferred to the present answering party. Line status LEDs at each station set gives specific visual indications to trace the progress of a call transfer.</p> |
申请公布号 |
CA1216050(A) |
申请公布日期 |
1986.12.30 |
申请号 |
CA19840458005 |
申请日期 |
1984.07.03 |
申请人 |
AMERICAN TELEPHONE AND TELEGRAPH COMPANY |
发明人 |
CARSON, ROBERT A.;FENTON, FRANCIS M.;JONES, DAVID F. |
分类号 |
H04M3/54;H04M9/00;H04Q3/62;(IPC1-7):H04M3/58;H04Q1/30 |
主分类号 |
H04M3/54 |
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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