Abstract: Embodiments of systems and methods for providing video redirection across multiple Information Handling Systems (IHSs) are discussed. In some embodiments, a method may include: receiving, via a video redirection client, a video stream produced by a video redirection server executed by a Baseboard Management Controller (BMC) of a selected IHS; providing the video stream to a framebuffer driver, where the frame buffer driver is configured to: (i) store frame data from the video stream onto a framebuffer memory; and (ii) in response to a determination that a host is not available, transmit control signals to a graphics core via an Advanced Microcontroller Bus Architecture (AMBA) high-performance bus (AHB)-to-Peripheral Component Interconnect (PCI) (AHB-to-PCI) bridge, where the graphics core is accessible via a PCI bus exclusively when the host is available; and transmitting the frame data to a display coupled to the chassis.

Abstract: Embodiments of systems and methods for providing video redirection across multiple Information Handling Systems (IHSs) are discussed. In some embodiments, a method may include: receiving, via a video redirection client, a video stream produced by a video redirection server executed by a Baseboard Management Controller (BMC) of a selected IHS; providing the video stream to a framebuffer driver, where the frame buffer driver is configured to: (i) store frame data from the video stream onto a framebuffer memory; and (ii) in response to a determination that a host is not available, transmit control signals to a graphics core via an Advanced Microcontroller Bus Architecture (AMBA) high-performance bus (AHB)-to-Peripheral Component Interconnect (PCI) (AHB-to-PCI) bridge, where the graphics core is accessible via a PCI bus exclusively when the host is available; and transmitting the frame data to a display coupled to the chassis.

Abstract: Embodiments of systems and methods for reducing Keyboard, Video, and Mouse (KVM) downtime during firmware update or failover events are discussed. In some embodiments, a chassis may include: a plurality of Information Handling Systems (IHSs); a first Enclosure controller (EC); and a second EC coupled to the first EC, where the first and second ECs comprise program instructions stored thereon that, upon execution, cause the chassis to: establish a KVM session with a selected IHS via the first EC; in response to the first EC receiving a firmware update command, update and restart the second EC; notify the first EC, by the second EC, that the update and restart is completed; trigger by a first KVM process in the first EC, a second KVM process in the second EC; and take control, by the second EC, of the KVM session.

Abstract: Embodiments of systems and methods for providing video redirection across multiple Information Handling Systems (IHSs) are discussed. In some embodiments, a method may include: receiving, via a video redirection client, a video stream produced by a video redirection server executed by a Baseboard Management Controller (BMC) of a selected IHS; providing the video stream to a framebuffer driver, where the frame buffer driver is configured to: (i) store frame data from the video stream onto a framebuffer memory; and (ii) in response to a determination that a host is not available, transmit control signals to a graphics core via an Advanced Microcontroller Bus Architecture (AMBA) high-performance bus (AHB)-to-Peripheral Component Interconnect (PCI) (AHB-to-PCI) bridge, where the graphics core is accessible via a PCI bus exclusively when the host is available; and transmitting the frame data to a display coupled to the chassis.

Abstract: An automatic optical power management system for use with an optical communications system includes a light source residing in a first circuit pack and adapted to emit light at a nominal power level only absent receipt of an indicator signifying a loss of signal resulting from a fiber discontinuity relating to the first optical fiber, wherein the nominal power level is of sufficient magnitude to violate laser safety guidelines in the event of the fiber discontinuity. A redundant detection system includes a first optical detector residing in the first circuit pack, and a second optical detector residing in a second circuit pack that is optically adjacent to the first circuit. A redundant response system communicates an indicator signifying loss of signal from the first and second optical detectors to the light source upon detection of loss of signal by either detector.

Abstract: An iterative process is used to set the phase prechirp of a WDM optical transport system to a system's optimal level that maximizes the signal quality. A signal degradation factor takes into account linear and non-linear effects along the optical path and is used as a receive end feedback signal to control the phase prechirp level at the transmitter site. By using the FEC corrected errors rate as the feedback signal, optimization of signal quality is performed even when the system is running error free. By using an adaptive phase prechirp transmitter, signal degradation compensation can be also performed on a per wavelength basis to compensate for the residual dispersion slope and to allow optimization of individual channels independently of the net link dispersion value.

Abstract: In accordance with the present invention, an improved method is provided for synchronizing a pulse stream with a data stream in an optical communications system. The improved method includes: generating an optical data signal for transmission through the optical communication system, where the data stream exhibits a duty cycle less than fifty percent and the optical data signal is formed from the pulse stream and the data stream; detecting an optical power level associated with the optical data signal; and synchronizing the pulse stream with the data stream based on the optical power level associated with the optical data signal. Specifically, the pulse stream is temporally aligned with the data stream when the average power of the optical data signal is maximized.

Abstract: An adaptive method is provided for applying chirp to an optical signal traversing through an optical network. The adaptive method comprises: applying chirp to an optical data signal at a transmitter in the optical network; transmitting the optical data signal through the optical network, the optical data signal having error detection data embedded therein; determining an error rate for the optical data signal at an egress point of the optical network, where the error rate is based on the error detection data embedded in the optical data signal; transmitting the error rate for the optical data signal to the transmitter; and adjusting the chirp being applied to the optical data signal at the transmitter based on the error rate for the optical data signal.

Abstract: In accordance with the present invention, an improved method is provided for synchronizing a pulse stream with a data stream in an optical communications system. The improved method includes: generating an optical data signal for transmission through the optical communication system, where the data stream exhibits a duty cycle less than fifty percent and the optical data signal is formed from the pulse stream and the data stream; detecting an optical power level associated with the optical data signal; and synchronizing the pulse stream with the data stream based on the optical power level associated with the optical data signal. Specifically, the pulse stream is temporally aligned with the data stream when the average power of the optical data signal is maximized.

Abstract: An automatic optical power management system for use with an optical communications system includes a light source residing in a first circuit pack and adapted to emit light at a nominal power level only absent receipt of an indicator signifying a loss of signal resulting from a fiber discontinuity relating to the first optical fiber, wherein the nominal power level is of sufficient magnitude to violate laser safety guidelines in the event of the fiber discontinuity. A redundant detection system includes a first optical detector residing in the first circuit pack, and a second optical detector residing in a second circuit pack that is optically adjacent to the first circuit. A redundant response system communicates an indicator signifying loss of signal from the first and second optical detectors to the light source upon detection of loss of signal by either detector.

Abstract: An adaptive method is provided for applying chirp to an optical signal traversing through an optical network. The adaptive method comprises: applying chirp to an optical data signal at a transmitter in the optical network; transmitting the optical data signal through the optical network, the optical data signal having error detection data embedded therein; determining an error rate for the optical data signal at an egress point of the optical network, where the error rate is based on the error detection data embedded in the optical data signal; transmitting the error rate for the optical data signal to the transmitter; and adjusting the chirp being applied to the optical data signal at the transmitter based on the error rate for the optical data signal.

Abstract: An iterative process is used to set the phase prechirp of a WDM optical transport system to a system's optimal level that maximizes the signal quality. A signal degradation factor takes into account linear and non-linear effects along the optical path and is used as a receive end feedback signal to control the phase prechirp level at the transmitter site. By using the FEC corrected errors rate as the feedback signal, optimization of signal quality is performed even when the system is running error free. By using an adaptive phase prechirp transmitter, signal degradation compensation can be also performed on a per wavelength basis to compensate for the residual dispersion slope and to allow optimization of individual channels independently of the net link dispersion value.

Abstract: In an optical communication system, efficient use of a Mach-Zehnder modulator requires accurate knowledge of the AC halfwave voltage at the desired modulation frequency. At high modulation frequencies this can be difficult to measure directly. A method of accurately measuring the AC halfwave voltage of a Mach-Zehnder modulator is described. The Mach-Zehnder modulator is biased at the peak of the transfer function curve and a sinusoidal signal of known amplitude and the desired frequency of measurement is applied. The optical power is measured with and without the sinusoidal signal. The ratio of the two optical powers is used in the Mach-Zehnder transfer equation to calculate the AC halfwave voltage.