Abstract: A communication system for extending range of USB communications that may include a host computer system having a USB host controller, a USB hub, and transmitter circuitry. The USB host controller may be configured to operate using a split transaction for the USB communications. The communication system may also include receiver circuitry that receives a non-USB format of USB communication signals as the signals appear between split start and split complete transaction operations at the host computer system. The transmitter circuitry may be configured to forward the non-USB formatted USB communication signals across an extension between the transmitter circuitry and the receiver circuitry. At least one USB user interface device may be communicatively coupled to the receiver circuitry and receives USB communication signals from a receiver hub in the receiver circuitry.

Abstract: A method of sharing user resources in a computer system through a universal serial bus (USB) interface. The method may involve, not necessarily in this order, associating at least one USB device with a first user and at least another USB device with a second user; assigning the first user to a first USB port; assigning the second user to a second USB port; permitting the first user to temporarily assume control of the computer system through the first USB port for operation of the at least one USB device; and blocking the second user from access to the computer system while the first user has temporary control of the computer system.

Abstract: A KVM extension configuration that includes a host connected to a transmitter for transmitting communication signals across an extension to a receiver where user interface devices are located. The host has a motherboard that supports USB communications. A USB adapter may be coupled to the transmitter that converts USB signals that the transmitter receives from the host to a non-USB format prior to transmission across the extension to the receiver where the user interface devices successfully communicate with the host. A transmitter core may be coupled to the transmitter that receives the non-USB signals from the USB adapter and transmits such signals to the receiver.

Abstract: A method of sharing user resources in a computer system through a universal serial bus (USB) interface. The method may involve, not necessarily in this order, associating at least one USB device with a first user and at least another USB device with a second user; assigning the first user to a first USB port; assigning the second user to a second USB port; permitting the first user to temporarily assume control of the computer system through the first USB port for operation of the at least one USB device; and blocking the second user from access to the computer system while the first user has temporary control of the computer system.

Abstract: A communication system for extending range of USB communications that may include a host computer system having a USB host controller, a USB hub, and transmitter circuitry. The USB host controller may be configured to operate using a split transaction for the USB communications. The communication system may also include receiver circuitry that receives a non-USB format of USB communication signals as the signals appear between split start and split complete transaction operations at the host computer system. The transmitter circuitry may be configured to forward the non-USB formatted USB communication signals across an extension between the transmitter circuitry and the receiver circuitry. At least one USB user interface device may be communicatively coupled to the receiver circuitry and receives USB communication signals from a receiver hub in the receiver circuitry.

Abstract: A KVM extension configuration that includes a host connected to a transmitter for transmitting communication signals across a KVM extension to a receiver where user interface devices are located. The host has a motherboard that supports USB communications. The KVM extension configuration includes a USB host controller at the receiver that initiates data reads and writes to the host as delayed transactions and supports USB protocol communication with a plurality of the user interface devices. The configuration also includes a transmitter core in the transmitter having shadow registers that include content that is copied from the configuration registers of the USB host controller at the receiver. The host successfully carries out USB communications with the transmitter through the use of the content of the shadow registers. In addition, the receiver periodically synchronizes the content of the shadow registers with content from the configuration registers of the USB host controller.

Abstract: A KVM extension configuration that includes a host connected to a transmitter for transmitting communication signals across an extension to a receiver where user interface devices are located. The host has a motherboard that supports USB communications. A USB adapter may be coupled to the transmitter that converts USB signals that the transmitter receives from the host to a non-USB format prior to transmission across the extension to the receiver where the user interface devices successfully communicate with the host. A transmitter core may be coupled to the transmitter that receives the non-USB signals from the USB adapter and transmits such signals to the receiver.

Abstract: A KVM extension configuration that includes a host connected to a transmitter for transmitting communication signals across a KVM extension to a receiver where user interface devices are located. The host has a motherboard that supports USB communications. The KVM extension configuration includes a USB host controller at the receiver that initiates data reads and writes to the host as delayed transactions and supports USB protocol communication with a plurality of the user interface devices. The configuration also includes a transmitter core in the transmitter having shadow registers that include content that is copied from the configuration registers of the USB host controller at the receiver. The host successfully carries out USB communications with the transmitter through the use of the content of the shadow registers. In addition, the receiver periodically synchronizes the content of the shadow registers with content from the configuration registers of the USB host controller.