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公开(公告)号：US3586785A
公开(公告)日：1971-06-22
申请号：US3586785D
申请日：1969-05-09
发明人： FEINER ALEXANDER
CPC分类号： H04Q3/54
摘要： An arrangement is disclosed for delaying the release of a dialing connection between a calling telephone station and a central office register when the station prematurely disconnects to permit the station to originate another call within a specified interval of time. The register is returned to a state in which it can accept a new complement of dialing signals. If another call is not originated within the specified interval of time, the register and the dialing connection through the switching network of the central office are released.
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公开(公告)号：US3902101A
公开(公告)日：1975-08-26
申请号：US38202873
申请日：1973-07-23
IPC分类号： H01H47/00
CPC分类号： H01H47/001
摘要： The use of a group of relays, all having only make contacts interconnected in a manner to allow a single current pulse to selectively operate one relay while at the same time releasing all the other relays, has resulted in the design of circuits where a one-hot out-of-n code can be used to control the operational states of the circuits. The fact that the relays have remanent reed sealed contacts and are thus self-latching greatly simplifies minimumization of peripheral equipment and reduces control complexity since a single current pulse can both select the desired circuit state by operating one of the relays and release any other operated relay.
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4.发明授权
公开(公告)号：US3629513A
公开(公告)日：1971-12-21
申请号：US3629513D
申请日：1969-11-24
发明人： FEINER ALEXANDER
CPC分类号： H04Q3/00
摘要： A single and double wire switching arrangement in which each balanced two-wire transmission circuit is transformer coupled with two single-wire network terminations with capacitive DC isolation between the transformer windings and a reference potential connected between the isolating capacitors. Either of two unbalanced single-wire paths or one balanced two-wire path can be established through the network from each transmission circuit. A single-wire path is sufficient for most functions; however, the two-wire path is available for those functions requiring a metallic or a balanced path. Network blocking is low since the majority of network paths are single wire thus freeing unused single-wire links, for other paths. Supervision can be maintained either at a transmission circuit or at a junctor circuit included in the network path.
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公开(公告)号：US3925625A
公开(公告)日：1975-12-09
申请号：US49182374
申请日：1974-07-25
CPC分类号： H04M9/006
摘要： There is disclosed a line circuit for use in the path between a switching machine and a telephone station for controlling communication services such as ringing and hold to the station. The line circuit is connected across the communication conduction pairs in a manner which allows removal without interrupting active telephone service. The transient signals which are generated whenever the station makes a transition from on-hook to off-hook and from off-hook to on-hook are used to obviate the need for line current detection. In this manner, the line relay is removed from the series path between the switching machine and the telephone station.
摘要翻译： 公开了一种用于切换机和电话站之间的路径中的线路电路，用于控制诸如振铃和保持到站的通信服务。 线路电路以允许移除而不中断有效电话服务的方式连接在通信导线对之间。 无论何时站点从挂机到摘机，从摘机到挂机，都会产生瞬态信号，以避免线路电流检测的需要。 以这种方式，线路继电器从切换机和电话站之间的串联路径中移除。
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公开(公告)号：US3895192A
公开(公告)日：1975-07-15
申请号：US49182274
申请日：1974-07-25
CPC分类号： H04M9/006
摘要： There is disclosed a line circuit for use in the path between a switching machine and a telephone station for controlling the hold function. The hold control circuit is arranged to respond to a momentary transient signal on the communication leads from the telephone station and to the presence or absence of a signal on the A lead from the station for establishing either the hold state or the disconnect state of the line circuit. Structure is disclosed for timing the release of the hold function on communication lead open conditions with the time delay dependent upon the insertion of a diode in series with the timing capacitor to adjust the voltage across the capacitor.
摘要翻译： 公开了用于控制保持功能的切换机和电话站之间的路径中的线路电路。 保持控制电路被设置为响应来自电话台的通信引线上的瞬时瞬态信号，以及来自站的A引线上是否存在用于建立线路的保持状态或断开状态的信号 电路。 公开了用于定时释放保持功能的结构，其中时间延迟取决于与定时电容器串联的二极管，以调整电容器两端的电压。
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公开(公告)号：US3882276A
公开(公告)日：1975-05-06
申请号：US45370574
申请日：1974-03-22
CPC分类号： H04M3/561
摘要： In lossless or low loss conferencing systems it is customary to use a hybrid to convert each station from 2-wire to 4-wire operation. Because of impedance mismatch conditions, reflections can occur at the hybrid interface thereby causing echo and ''''singing'''' problems. Self-cancellation of the reflected signals can be achieved by reversing the phase of the reflected signals through the hybrids and assigning the reversed phase hybrids only to stations connected to the system by trunks. For those stations connected to the system by lines, 5dB pads are used in conjunction with unreversed phase hybrids. In this way complex switching is avoided.
摘要翻译： 在无损或低损耗会议系统中，通常使用混合动力将每个站从2线转换为4线操作。 由于阻抗失配条件，混合界面可能发生反射，从而引起回声和“唱歌”问题。 反射信号的自消除可以通过将反射信号的相位反转通过混合动力并将逆相混合器仅分配给通过干线连接到系统的站来实现。 对于通过线路连接到系统的那些站，5dB焊盘与未反相相位混合使用。 以这种方式避免了复杂的切换。
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公开(公告)号：US3492436A
公开(公告)日：1970-01-27
申请号：US3492436D
申请日：1966-10-12
发明人： FEINER ALEXANDER , ULRICH WERNER
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