公开(公告)号：US06216170B1

公开(公告)日：2001-04-10

申请号：US08798273

申请日：1997-02-14

申请人： Michael Joseph Giovannoni ,  Joseph David Kralowetz ,  James Francis Landry ,  Thomas DeBruyne Stearns

发明人： Michael Joseph Giovannoni ,  Joseph David Kralowetz ,  James Francis Landry ,  Thomas DeBruyne Stearns

IPC分类号： G06F1300

CPC分类号： H04L12/4641 ,  H04L12/4604

摘要： Methods and apparatus for providing virtual local connection of one PC to another PC, a PC to a LAN and from one LAN to another LAN, over a synchronous digital wide area network (effectively enabling a LAN to be extended through a synchronous digital wide area network on a virtual basis), using a PC adapter card that includes an on board Data Service Unit (DSU)/Channel Service Unit (CSU), driven by control means that functions at least in part as a LAN interface emulator. The invention includes methods (and corresponding apparatus) for configuring the PC adapter card under program control; for establishing connectivity between at least one PC and at least one LAN, each separately connected to the network, via a gateway access thru the digital wide area network; and for utilizing the PC motherboard microprocessor to run user applications software while simultaneously being able to handle the real time constraints of running packet protocols (e.g., Frame Relay, X.25, SMDS, etc.), using a novel control means.

摘要翻译： 用于通过同步数字广域网将一台PC的虚拟本地连接提供给另一PC，PC到LAN和从一个LAN到另一LAN的虚拟本地连接（有效地使LAN能够通过同步数字广域网扩展 在虚拟的基础上），使用包括板载数据服务单元（DSU）/信道服务单元（CSU）的PC适配器卡，由至少部分作为LAN接口仿真器的控制装置驱动。 本发明包括用于在程序控制下配置PC适配器卡的方法（和相应的装置）; 用于在至少一个PC与至少一个LAN之间建立连接，所述至少一个LAN通过经由所述数字广域网的网关访问分别连接到所述网络; 并且利用PC主板微处理器来运行用户应用软件，同时使用新的控制装置同时处理运行分组协议（例如，帧中继，X.25，SMDS等）的实时约束。

公开(公告)号：US5659684A

公开(公告)日：1997-08-19

申请号：US383302

申请日：1995-02-03

申请人： Michael Joseph Giovannoni ,  Joseph David Kralowetz ,  James Francis Landry ,  Thomas DeBruyne Stearns

发明人： Michael Joseph Giovannoni ,  Joseph David Kralowetz ,  James Francis Landry ,  Thomas DeBruyne Stearns

IPC分类号： H04L12/46 ,  G06F13/00

CPC分类号： H04L12/4641 ,  H04L12/4604

摘要： Methods and apparatus for providing virtual local connection of one PC to another PC, a PC to a LAN and from one LAN to another LAN, over a synchronous digital wide area network (effectively enabling a LAN to be extended through a synchronous digital wide area network on a virtual basis), using a PC adapter card that includes an on board Data Service Unit (DSU)/Channel Service Unit (CSU), driven by control means that functions at least in part as a LAN interface emulator. The invention includes methods (and corresponding apparatus) for configuring the PC adapter card under program control; for establishing connectivity between at least one PC and at least one LAN, each separately connected to the network, via a gateway access thru the digital wide area network; and for utilizing the PC motherboard microprocessor to run user applications software while simultaneously being able to handle the real time constraints of running packet protocols (e.g., Frame Relay, X.25, SMDS, etc.), using a novel control means.

摘要翻译： 用于通过同步数字广域网将一台PC的虚拟本地连接提供给另一PC，PC到LAN和从一个LAN到另一LAN的虚拟本地连接（有效地使LAN能够通过同步数字广域网扩展 在虚拟的基础上），使用包括板载数据服务单元（DSU）/信道服务单元（CSU）的PC适配器卡，由至少部分地作为LAN接口仿真器的控制装置驱动。 本发明包括用于在程序控制下配置PC适配器卡的方法（和相应的装置）; 用于在至少一个PC与至少一个LAN之间建立连接，所述至少一个LAN通过经由所述数字广域网的网关访问分别连接到所述网络; 并且利用PC主板微处理器来运行用户应用软件，同时使用新的控制装置同时处理运行分组协议（例如，帧中继，X.25，SMDS等）的实时约束。