公开(公告)号：US5590172A

公开(公告)日：1996-12-31

申请号：US639538

申请日：1996-04-29

申请人： John P. Lodwig ,  Kenneth A. Felix ,  Charles L. Whittington

发明人： John P. Lodwig ,  Kenneth A. Felix ,  Charles L. Whittington

IPC分类号： H04B7/26 ,  H04W36/12 ,  H04Q7/20 ,  H04Q7/22 ,  H04Q7/38

CPC分类号： H04W36/12

摘要： A method of transferring a user message-conveying radiotelephone call by a subscriber unit from a first radio coverage area, served by a first fixed control unit which is coupled to a wireline telephone switch, to a second radio coverage area served by a second fixed control unit, includes transmitting a directory number, associated with the first fixed control unit and the wireline telephone switch, the directory number identifying a wireline telephone number of the first fixed control unit, from the first fixed control unit to the subscriber unit; storing the transmitted directory number at the subscriber unit; transmitting the stored directory number from the subscriber unit to the second fixed control unit when a need for transfer of the radiotelephone call to the second fixed control unit from the first fixed control unit is determined; calling the transmitted directory number from the second fixed control unit; in response to the calling of the directory number, connecting the second fixed control unit to the first fixed control unit via the wireline telephone switch; and transferring control of the radiotelephone call from the first fixed control unit to the second fixed control unit by dialing the transmitted directory number from the second fixed control unit.

摘要翻译： 一种由用户单元从耦合到有线电话交换机的第一固定控制单元服务的第一无线电覆盖区域传送用户消息传送无线电话呼叫到由第二固定控制器服务的第二无线电覆盖区域的方法 单元，从第一固定控制单元向用户单元发送与第一固定控制单元和有线电话交换机相关联的目录号码，该目录号码识别第一固定控制单元的有线电话号码; 将所发送的目录号码存储在用户单元处; 当确定从第一固定控制单元向第二固定控制单元传送无线电话呼叫的需要时，将存储的目录号码从用户单元发送到第二固定控制单元; 从第二固定控制单元呼叫所发送的目录号码; 响应于所述目录号码的呼叫，经由所述有线电话交换机将所述第二固定控制单元连接到所述第一固定控制单元; 以及通过从所述第二固定控制单元拨打所发送的号码簿号码，将所述无线电话呼叫的控制从所述第一固定控制单元传送到所述第二固定控制单元。

公开(公告)号：US5123014A

公开(公告)日：1992-06-16

申请号：US486468

申请日：1990-02-27

申请人： John C. Federkins ,  Charles L. Whittington ,  Hueiming Yang

发明人： John C. Federkins ,  Charles L. Whittington ,  Hueiming Yang

IPC分类号： H04L29/06 ,  H04L29/08

CPC分类号： H04L29/06 ,  H04L69/324

摘要： A method and apparatus for arranging an HDLC data link to transport a special class of data such as, for example, synchronization or other signalling informaiton, in addition to the normal data transported by the data link is provided. According to the invention, at the sending end of the link the all-1's sequence corresponding to the idle sequence between individual HDLC packets is detected. Once eight (8) consecutive 1's are detected, a desired number of 1's is removed and a like number of synchronization bits are inserted in their place. At the receiving end of the link the inserted synchronization bits are detected, removed, and a like number of 1's inserted in their place.

公开(公告)号：US4473878A

公开(公告)日：1984-09-25

申请号：US330052

申请日：1981-12-14

申请人： John E. Zolnowsky ,  Charles L. Whittington ,  William M. Keshlear

发明人： John E. Zolnowsky ,  Charles L. Whittington ,  William M. Keshlear

IPC分类号： G06F12/10 ,  G06F9/36

CPC分类号： G06F12/1036

摘要： A memory management unit of use in a memory management system. The memory management unit selectively maps a logical address to a respective physical address in accordance with a selected one of a plurality of segment descriptors, each of which defines a logical-to-physical address mapping and a range of address spaces for which such mapping is valid. The mapping is achieved using an improved associative memory circuit. Means are provided to detect mapping conflicts between new segment descriptors and segment descriptors already stored, and to prevent the storage of such conflicting segment descriptors. A method and circuit are provided to coordinate the parallel operation of a plurality of the memory management units or the like.

摘要翻译： 一种在存储器管理系统中使用的存储器管理单元。 存储器管理单元根据多个片段描述符中选择的一个片段描述符来选择性地将逻辑地址映射到相应的物理地址，每个片段描述符定义了逻辑到物理地址映射以及一定范围的地址空间， 有效。 使用改进的关联存储器电路实现映射。 提供了用于检测已经存储的新的段描述符和段描述符之间的映射冲突的手段，并且防止存储这种冲突的段描述符。 提供了一种方法和电路来协调多个存储器管理单元等的并行操作。

公开(公告)号：US4918572A

公开(公告)日：1990-04-17

申请号：US289885

申请日：1988-12-27

申请人： Carl R. Tarver ,  James G. Lawrence ,  Charles L. Whittington

发明人： Carl R. Tarver ,  James G. Lawrence ,  Charles L. Whittington

IPC分类号： G06F1/18 ,  H05K7/14

CPC分类号： G06F1/18 ,  H05K7/1429 ,  Y10S439/928

摘要： Method and apparatus for packaging electronic equipment comprise a housing and a "midplane" that is removably secured to suitable flanges centrally located within the housing. Individual sub-modules (CPU, disk drive, I/O unit, power supply, etc.) have suitable electrical connectors which mate with corresponding connectors on the midplane. The sub-modules are inserted into the midplane from different sides of the housing. The exposed, outer surfaces of the sub-modules may either be finished in final form, or suitable bezels may be placed over the sides of the housing so that the sub-modules can be appropriately accessed for necessary replacement or repair.

摘要翻译： 用于包装电子设备的方法和装置包括壳体和“中平面”，其可移除地固定到位于壳体内的合适的凸缘。 单个子模块（CPU，磁盘驱动器，I / O单元，电源等）具有与中平面上相应连接器相配的电气连接器。 子模块从壳体的不同侧插入中平面。 子模块的暴露的外表面可以以最终形式完成，或者可以将适当的边框放置在壳体的侧面上，使得可以适当地访问子模块以进行必要的更换或修理。

公开(公告)号：US4719567A

公开(公告)日：1988-01-12

申请号：US373206

申请日：1982-04-29

申请人： Charles L. Whittington ,  John Zolnowsky

发明人： Charles L. Whittington ,  John Zolnowsky

IPC分类号： G06F13/36 ,  G06F13/364 ,  G06F11/34

CPC分类号： G06F13/36 ,  G06F13/364

摘要： A bus master is prevented from utilizing a communication bus during a current sample interval if the utilization rate of the communication bus during the immediately preceeding sample interval exceeded a selected limit.

摘要翻译： 如果在紧接前一个采样间隔期间通信总线的利用率超过选定的限制，则在当前采样间隔期间，总线主控器被阻止利用通信总线。