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公开(公告)号：US4558464A
公开(公告)日：1985-12-10
申请号：US757762
申请日：1985-07-22
Applicant: Thomas E. O'Brien, Jr.
Inventor： Thomas E. O'Brien, Jr.
CPC classification number: H04N7/17363 , H04H20/78 , H04H60/15 , H04H2201/70
Abstract: An addressable CATV converter for connection with a remote headend in a cable distribution system contains a memory into which a unique address code identifying that converter is downloaded from the remote headend.
Abstract translation: 用于与电缆分配系统中的远程头端连接的可寻址CATV转换器包含存储器，从该远程头端向其中标识该转换器的唯一地址代码从该存储器中下载。
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公开(公告)号：US4689619A
公开(公告)日：1987-08-25
申请号：US813502
申请日：1985-12-26
Applicant: Thomas E. O'Brien, Jr.
Inventor： Thomas E. O'Brien, Jr.
CPC classification number: H04L12/403 , H04J3/0682 , H04N7/17354 , H04N2007/17372
Abstract: Subscriber terminals serviced by a plurality of remotely located two-way addressable cable television systems are polled using polling command signals addressed to the different terminals from a polling center. The polling command signals are sent to the subscriber terminals via their associated headends. Responses from the polled subscriber terminals are successively received at the polling center. The round trip signal propagation times required to communicate the polling command and response signals to and from each of the headends is equalized so that the response from the polled subscriber terminals are received in the same order in which the terminals are addressed by the polling command signals. A uniform delay is inserted after each successive polling command signal to allow for variations in the signal propagation times between the headends and individual subscriber terminals coupled thereto.
Abstract translation: 由多个位于远程位置的双向可寻址有线电视系统服务的用户终端使用从轮询中心寻址到不同终端的轮询命令信号进行轮询。 轮询命令信号经相关头端发送给用户终端。 在轮询中心连续收到轮询用户终端的响应。 将来自每个头端的轮询命令和响应信号传送所需的往返信号传播时间相等，从而以与轮询命令信号寻址终端相同的顺序接收来自被轮询的用户终端的响应 。 在每个连续的轮询命令信号之后插入均匀的延迟，以允许头端与与其耦合的各个用户终端之间的信号传播时间的变化。
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