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1. 发明授权

US4685127A System for converting a No. 5 crossbar telephone switching central office to a conforming equal access central office 失效
标题翻译：将5号交叉口电话交换中心局转换为符合条件的同等接入中心局的系统
公开(公告)号：US4685127A
公开(公告)日：1987-08-04
申请号：US782455
申请日：1985-10-01
申请人： Arthur O. Miller , Hollis Coleman , Roger Atkinson , Boyd Dorsey
发明人： Arthur O. Miller , Hollis Coleman , Roger Atkinson , Boyd Dorsey
IPC分类号： H04M7/12 , H04Q3/00 , H04Q3/48
CPC分类号： H04Q3/0004
摘要： A method of providing equal access to a number of long distance carriers in local telephone company office containing No. 5 crossbar switching machines. Calls are intercepted between the line link frame and the originating registers. If the call is a long distance call, a serial number which resembles a conventional phone call is inserted in the calls place. The called number is stored and the appropriate carrier is determined by locating the calling party's pre-selected carrier choice in telephone company records. When the call identified by the serial number exits the switch it is automatically routed to the correct long distance carrier.
摘要翻译：一种方法，可以在包含5号交叉开关机的本地电话公司办公室中提供同等接入多条长途电话的方法。呼叫在线路链路帧和始发寄存器之间被拦截。如果呼叫是长途电话，则类似传统电话的序列号插入到呼叫地点。被叫号码被存储，并且通过将主叫方的预先选择的载波选择定位在电话公司记录中来确定适当的载波。当序列号识别的呼叫退出交换机时，它将自动路由到正确的长途运营商。

2. 发明授权

US4149040A Identifier circuit for identifying party line subscribers 失效
标题翻译：识别线路用户的识别电路
公开(公告)号：US4149040A
公开(公告)日：1979-04-10
申请号：US849244
申请日：1977-11-07
申请人： Roger Atkinson
发明人： Roger Atkinson
IPC分类号： H04M15/36
CPC分类号： H04M15/36
摘要： An identifier circuit for connection between a telephone system party line and a party line subscriber to permit identification of a calling party line subscriber with automatic number identifying equipment at a central office. The identifier circuit includes a pair of terminals adapted to be selectively connected to ground in accordance with identification of a particular party line subscriber, a pair of normally nonconductive test transistors each connected between one of the terminals and one of the leads of the party line, a pair of control transistors responsive to voltage on the party line to maintain the test transistors nonconductive and responsive to removal of the party line voltage to permit the test transistors to conduct, and a pair of capacitors charged when a calling subscriber goes off hook and discharged to maintain the test transistors conductive for a predetermined time during which testing of the party line to identify the calling subscriber can be accomplished with automatic number identifying equipment at the central office.
摘要翻译：一种用于在电话系统方线路和方线路用户之间连接的标识符电路，以允许在中心局识别具有自动号码识别设备的呼叫方线路用户。标识符电路包括一对终端，其适于根据特定的一方用户的识别选择性地连接到地，一对正常非导通的测试晶体管，每个连接在一个终端和一方的线路中的一个引线之间，一对响应于该线路上的电压的控制晶体管，以保持测试晶体管不导通，并且响应于去除该方线路电压以允许测试晶体管导通，以及当主叫用户脱扣时放电的一对电容器以将测试晶体管保持导通预定时间，在该预定时间期间，可以通过在中心局处的自动号码识别设备来实现识别主叫用户的该方线路的测试。

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