发明名称 Unique ring caller ID
摘要 A system and method for suppressing ring signal pulses on a telephone line, the system comprises: (a) determining means for determining a duration and a frequency of the ring signal pulses, and (b) attenuating means, responsive to the duration and the frequency of the ring signal pulses, for attenuating the ring signal pulses. Attenuating the ring pulses includes limiting the voltage difference between TIP and RING lines during the ring pulses to suppress the ring signal or a portion of the ring signal on each telephone connected to the same line.
申请公布号 US6058171(A) 申请公布日期 2000.05.02
申请号 US19960689803 申请日期 1996.08.14
申请人 OAKLEY TELECOM, LC 发明人 HOOPES, THOMAS A.
分类号 H04M1/56;H04M15/06;(IPC1-7):H04M1/56 主分类号 H04M1/56
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