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
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