公开(公告)号：US4406004A

公开(公告)日：1983-09-20

申请号：US204298

申请日：1980-11-05

申请人： Jay D. Hall ,  Theodore M. Stump ,  Charles W. Thode

发明人： Jay D. Hall ,  Theodore M. Stump ,  Charles W. Thode

IPC分类号： H04M3/02 ,  H04M19/02 ,  H04Q5/02 ,  H04Q11/04 ,  H04J3/12 ,  H04Q5/08

CPC分类号： H04Q5/02 ,  H04M19/023 ,  H04Q11/04

摘要： A ring scheduling apparatus for use in a digital multiplexed telephone communication system. The apparatus utilizes a controller which sorts messages indicating which telephone lines are being rung and what frequency and DC signal level are required to ring the lines. The messages are sorted into voltage and frequency compatible groups, and then digital data is sent to a ring signal generating circuit to control the frequency of the ring signal generated and the polarity of the DC signal upon which the ring signal is superimposed. Disclosure of a multiplexer and line interface circuitry for use in this system is included as well as a self-test circuit for testing the audio circuitry of idle telephone lines.

摘要翻译： 一种用于数字多路复用电话通信系统的环形调度装置。 该装置利用一种控制器，该控制器分类指示哪些电话线正在进行的消息以及需要什么频率和DC信号电平来振铃线路。 将消息分为电压和频率兼容组，然后将数字数据发送到振铃信号发生电路，以控制所产生的振铃信号的频率和重叠振铃信号的直流信号的极性。 还包括用于该系统的复用器和线路接口电路的公开以及用于测试空闲电话线的音频电路的自检电路。

公开(公告)号：US06523801B2

公开(公告)日：2003-02-25

申请号：US09826560

申请日：2001-04-04

申请人： Christopher D. Combs ,  Jay D. Hall

发明人： Christopher D. Combs ,  Jay D. Hall

IPC分类号： F16M1300

CPC分类号： H05K13/0069 ,  H05K3/3415

摘要： A compliant member configured to support a substrate during automated placement of components and a tray configured to support the compliant member and removably attach to a support member.