公开(公告)号：US5386417A

公开(公告)日：1995-01-31

申请号：US113496

申请日：1993-08-27

申请人： Thomas H. Daugherty ,  Dennis L. DeBruler ,  Daniel S. Greenberg ,  David J. Hodgdon ,  Douglas J. Murphy

发明人： Thomas H. Daugherty ,  Dennis L. DeBruler ,  Daniel S. Greenberg ,  David J. Hodgdon ,  Douglas J. Murphy

IPC分类号： H04Q3/545 ,  H04M3/00 ,  H04Q3/58 ,  H04Q3/66 ,  H04Q11/04 ,  H04M3/42

CPC分类号： H04Q3/58

摘要： A communications switch communicates a message to a particular access network endpoint by forwarding an identification of that endpoint along with the message, link-by-link, through the access network, the forwarding being accomplished by using previously stored routing information identifying, at the switch and at each cross-connection point, a particular downstream link over which the endpoint can ultimately be reached. The links connecting the cross-connection points are multiplexed links supporting digital loop carrier and fiber-in-the-loop communications. The routing information is generated and stored automatically by having each network element report information about itself upstream into the network.

摘要翻译： 通信交换机通过接入网转发该端点的标识以及该链路的链路，通过使用先前存储的路由信息​​，在该交换机上识别，来完成该消息到特定的接入网络端点 并且在每个交叉连接点处，最终可以到达端点的特定下游链路。 连接交叉点的链路是支持数字环路载波和光纤在线通信的复用链路。 通过使每个网络单元将关于其自身的信息上报到网络中来自动生成和存储路由信息。

公开(公告)号：US5251215A

公开(公告)日：1993-10-05

申请号：US819554

申请日：1992-01-13

申请人： Subrahmanyam Dravida ,  Daniel S. Greenberg ,  David J. Hodgdon

发明人： Subrahmanyam Dravida ,  Daniel S. Greenberg ,  David J. Hodgdon

IPC分类号： H03M13/09 ,  H04L1/00 ,  H04L12/56 ,  G06F11/08

CPC分类号： H03M13/093 ,  H04L1/0083 ,  H04L12/56

摘要： Disclosed is a method and circuit for modifying the check code of a data packet based on a first seed to accommodate the addition or substraction of a header. A number of bits, which include a second seed, an exclusive OR function of the first seed and a portion of a header, and a string of zeros dependent upon the length of an incoming data packet, is sent through a CRC generator. The resulting CRC calculation and the incoming packet check code are exclusive ORed to produce a modified check code taking into account the addition or substraction of the header.

摘要翻译： 公开了一种用于基于第一种子来修改数据分组的校验码以适应标题的加法或减法的方法和电路。 通过CRC发生器发送包括第二种子，第一种子和报头的一部分的异或功能以及取决于输入数据分组的长度的零串的位数。 所得到的CRC计算和传入的分组检查代码是异或运算，以产生修改的检验代码，考虑到报头的加法或减法。

公开(公告)号：US5305320A

公开(公告)日：1994-04-19

申请号：US953571

申请日：1992-10-06

申请人： Michael W. Andrews ,  Stephen J. Brolin ,  Robert W. DeMarco ,  Daniel S. Greenberg ,  David J. Hodgdon ,  Chandan Sarkar ,  Gordon D. Woods

发明人： Michael W. Andrews ,  Stephen J. Brolin ,  Robert W. DeMarco ,  Daniel S. Greenberg ,  David J. Hodgdon ,  Chandan Sarkar ,  Gordon D. Woods

IPC分类号： H04L12/44 ,  H04Q11/04 ,  H04L29/08

CPC分类号： H04Q11/04 ,  H04L12/44

摘要： Disclosed is a communications network for peripherals in a digital loop carrier transmission system. A broadcast STAR network is employed so that all peripherals receive any message which is broadcast by any of the peripherals. No peripheral broadcasts without clearance from the active communications hub. Two hubs can be provided to alternatively act as the active hub. Each peripheral includes a controller which transmits a request to send signal, multiplexes the request to send signal with an outgoing message, receives clear to send signals, and demultiplexes the clear to send signals from an incoming message.

摘要翻译： 公开了一种用于数字环路载波传输系统中的外围设备的通信网络。 使用广播STAR网络，使得所有外围设备都接收任何外围设备广播的任何消息。 没有外界广播没有从主动通信中心的清除。 可以提供两个集线器以备选地用作主动集线器。 每个外围设备包括发送请求发送信号的控制器，将发送信号的请求与输出消息复用，接收清除发送信号，以及从输入消息解复用发送信号。

公开(公告)号：US5381405A

公开(公告)日：1995-01-10

申请号：US113481

申请日：1993-08-27

申请人： Thomas H. Daugherty ,  Dennis L. DeBruler ,  Daniel S. Greenberg ,  David J. Hodgdon ,  Douglas J. Murphy

发明人： Thomas H. Daugherty ,  Dennis L. DeBruler ,  Daniel S. Greenberg ,  David J. Hodgdon ,  Douglas J. Murphy

IPC分类号： H04M3/00 ,  H04Q3/58 ,  H04Q11/04 ,  H04M3/42

CPC分类号： H04Q3/58

摘要： A communications switch communicates a message to a particular access network endpoint by forwarding an identification of that endpoint along with the message, link-by-link, through the access network, the forwarding being accomplished by using previously stored routing information identifying, at the switch and at each cross-connection point, a particular downstream link over which the endpoint can ultimately be reached. The links connecting the cross-connection points am time-division-multiplexed links supporting digital loop carrier and fiber-in-the-loop communications. The routing information is generated and stored automatically by having each network element report information about itself upstream into the network.

摘要翻译： 通信交换机通过接入网转发该端点的标识以及该链路的链路，通过使用先前存储的路由信息​​，在该交换机上识别，来完成该消息到特定的接入网络端点 并且在每个交叉连接点处，最终可以到达端点的特定下游链路。 连接交叉连接点的链路是支持数字环路载波和光纤在线通信的时分复用链路。 通过使每个网络单元将关于其自身的信息上报到网络中来自动生成和存储路由信息。