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公开(公告)号：US4782516A
公开(公告)日：1988-11-01
申请号：US66288
申请日：1987-06-25
摘要： Control equipment employed in a customer-owned public telephone station prevents a user from making unauthorized telephone calls in the telephone system. Operating under the control of a computer in the station, the control equipment is responsive to momentary loop breaks occurring on tip and ring lines connecting the station to a central office, and to a loop break provided by the central office which reflects that the far end party has disconnected. The control equipment is also responsive to scheduled as well as as unscheduled receipt of dial tone. The combination of ongoing loop break and dial tone detection and analysis conveniently provides the desired protection for reliable operation of the customer-owned public telephone station in the telephone system. Restrictions incorporated in the station for obtaining the desired protection are applied with minimal inconvenience for the legitimate user.
摘要翻译： 在客户所属的公共电话台中使用的控制设备阻止用户在电话系统中进行未经授权的电话呼叫。 在车站计算机控制下运行时，控制设备响应于将车站连接到中心局的尖端和环线上发生的瞬间回路中断，以及由中心局提供的循环中断，这反映出远端 派对已断开。 控制设备也响应计划以及作为拨号音的非计划接收。 正在进行的循环中断和拨号音检测和分析的组合方便地为电话系统中的客户所属公共电话台的可靠运行提供了期望的保护。 为了获得期望的保护而结合在站中的限制被应用于合法用户的最小的不便。
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公开(公告)号：US4794642A
公开(公告)日：1988-12-27
申请号：US100697
申请日：1987-09-24
摘要： Control equipment employed in a customer-owned public telephone station prevents a user from making unauthorized telephone calls in a telephone system. Operating under the control of a computer in the station, the control equipment employs a call screening process which restricts the telephone numbers a user can dial to those numbers preselected by a station owner. The telephone numbers are categorized in multiple but distinct groups, each of which represents a specific class of telephone call. The control equipment is responsive to momentary loop breaks occurring on tip and ring lines connecting the station to a central office, and to a loop break provided by the central office which reflects that the far end party has disconnected. The control equipment is also responsive to scheduled as well as unscheduled receipt of dial tone. The combination of the call screening process along with the ongoing loop break and dial tone detection and analysis conveniently provides the desired protection so that the user will be properly charged for telephone calls made from the station. The restrictions incorporated in the station for obtaining this protection are applied with minimal inconvenience for the legitimate user.
摘要翻译： 在客户所属公共电话台中使用的控制设备阻止用户在电话系统中进行未经授权的电话呼叫。 在车站计算机的控制下操作，控制设备采用呼叫筛选过程，该过程限制用户可以拨打由车主所预先选择的号码的电话号码。 电话号码分为多个但不同的组，每个组代表特定类别的电话。 控制设备响应于将车站连接到中心局的尖端和环线上发生的瞬时回路中断，以及由中心局提供的循环中断，这反映出远端方已断开连接。 控制设备也响应于预定的以及非计划的接收拨号音。 呼叫筛选过程的组合以及正在进行的循环中断和拨号音检测和分析方便地提供期望的保护，使得用户将对从站进行的电话进行适当的收费。 对于合法使用者来说，对站点中包含的用于获得此保护的限制的应用最小化。
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