Abstract: An ambient light sensor may be used to measure ambient light in an environment that surrounds a device. The measured ambient light may be used to adjust display settings employed by the device, and thereby improve a user experience during interaction with the device in the environment. During use of the device that includes an ambient light sensor, the ambient light sensor may become obscured (blocked, covered, etc.) by a user's finger, a cover, dirt, and/or by another object that obstructs the ambient light sensor's ability to detect light from the environment. Various techniques may be used to determine obstruction of the ambient light sensor. In some embodiments, changes in display settings may be compared to measured changes in ambient light to determine whether a light sensor is obstructed. In some embodiments, use of a second light sensor may validate whether a first light sensor is obstructed.

Abstract: In one embodiment, a method includes identifying first and second memory segments associated with a process in virtual memory, allocating memory for the first memory segment from a first contiguous physical memory space, allocating memory for the second memory segment from a second contiguous physical memory space, and mapping the first and second memory segments to the first and second contiguous physical memory spaces in a translation lookaside buffer. Apparatus and logic for memory allocation to minimize translation lookaside buffer faults are also disclosed.

Abstract: A device and method provides a means for monitoring a media segment of a Real-time Transport Protocol (RTP) media stream without interfering with end-to-end monitoring of the RTP media stream. The device includes a media segment monitor to generate segment control messages associated with a selected segment of the RTP media stream transmitted between a source endpoint and a destination endpoint in a packet network. The device further includes an interface to transmit and receive the segment control messages; and a processor to process the segment control messages, the segment control messages including call quality metrics related to the selected segment of the RTP media stream.

Abstract: An improved method and system for connecting Super Group 3 fax machines over network gateways that operate using the un-enhanced T.38 protocol. With the present invention, the CM tone is suppressed. Thus a gateway that generates an AnsAm tone, will not receive a CM tone in response. The T.38 protocol does not specify what occurs if a CM tone is not received; however, it has been found that, in practice, existing fax machines fall back to V.21 mode if a CM tone is not received.

Abstract: A method and system for connecting V.34 enabled fax machines (that is fax machines capable of operating at 33,600 bps) over network gateways that use the un-enhanced T.38 protocol, that is, gateways that have not been upgraded to handle the V.34 33,600 bps protocol in fax relay mode. When a gateway detects a V.8 protocol signal, the signal is modified so that the fax machines fall back to non V.34 protocol and operate at a slower speed which the un-enhanced T.38 gateway is capable of handling.

Abstract: In one embodiment, a method includes identifying first and second memory segments associated with a process in virtual memory, allocating memory for the first memory segment from a first contiguous physical memory space, allocating memory for the second memory segment from a second contiguous physical memory space, and mapping the first and second memory segments to the first and second contiguous physical memory spaces in a translation lookaside buffer. Apparatus and logic for memory allocation to minimize translation lookaside buffer faults are also disclosed.

Abstract: A device and method provides a means for monitoring a media segment of a Real-time Transport Protocol (RTP) media stream without interfering with end-to-end monitoring of the RTP media stream. The device includes a media segment monitor to generate segment control messages associated with a selected segment of the RTP media stream transmitted between a source endpoint and a destination endpoint in a packet network. The device further includes an interface to transmit and receive the segment control messages; and a processor to process the segment control messages, the segment control messages including call quality metrics related to the selected segment of the RTP media stream.

Abstract: In accordance with a method and apparatus of the present invention, a voice communication system is disclosed for use in a packet switching network environment including a host server for communicating voice information, initiated by a telephone user, to an electronic mail (email) recipient. A public switching telephone network (PSTN) includes at least one telephone device for communicating the voice information therethrough. The host server is responsive to email messages, transmitted in packet form, through the packet switching network The voice communication system includes a network device responsive to a voice message generated by the telephone user.

Abstract: An embodiment of the present invention includes a fax communication system for communicating fax information between a first fax machine having error correction capability and a second fax machine. The first and second fax machines are coupled to communicate with one another across a packet switching network. A network device is coupled to received fax information from the first fax machine and accumulates a portion of the fax information and stalls the second fax machine while accumulating the fax information portion until the latter is transmitted to the second fax machine free of errors across the packet switching network. Accordingly, information traffic across the packet switching network is decreased thereby avoiding a network avalanche effect.

Abstract: In a Voice Over IP telephone system, a method and system for switching to a backup gateway. Only the media path is maintained during the switchover. The call setup information and the history of the call (that is, the control path information) are not maintained, thereby greatly simplifying the switchover. Since the call setup information is not maintained, the calls that are switched to the backup gateway cannot be terminated in a normal manner. Instead, the calls are terminated by detecting inactivity in the media path.

Abstract: An email/fax communication system is disclosed for use in a packet switching network environment including a mail server for storing email messages for transmission thereof, in the form of a fax document, to one or more recipient fax machines. In one embodiment of the present invention, the email/fax communication system is disclosed to include a router for receiving a first email message, in the form of packets, from the mail server, for converting the first email message packets to first fax pages of a fax document and for transmitting the first fax pages to the one or more recipient fax machines.

Abstract: An improved method and system for connecting Super Group 3 fax machines over network gateways that operate using the un-enhanced T.38 protocol. With the present invention, the CM tone is suppressed. Thus a gateway that generates an AnsAm tone, will not receive a CM tone in response. The T.38 protocol does not specify what occurs if a CM tone is not received; however, it has been found that, in practice, existing fax machines fall back to V.21 mode if a CM tone is not received.

Abstract: The invention provides a way to fallback to a PSTN call at any time during a VoIP call when Quality of Service in a VoIP network falls below some acceptable level. The PSTN fallback calls can be retrieved “midcall” and rerouted back over the VoIP network. This provides optimal utilization of VoIP without sacrificing the quality of the call connection. Calls are cheaper because PSTN fallback calls are only established temporarily for the amount of time that the QoS problem exists on the VoIP network. Call fallback is conducted in a VoIP gateway by first receiving an incoming call. A Voice over IP (VoIP) call is established for the incoming call over the VoIP network. VoIP packets are encoded from the voice signals in the incoming call and sent over the VoIP network. Quality of service of the VoIP network is monitored during the VoIP call and a fallback call is setup over a PSTN network at any time during the VoIP call when the monitored quality of service of the VoIP network degrades.

Abstract: An embodiment of the present invention includes a fax communication system for communicating fax information transmitted from a sending fax device to a fax recipient through a packet switching network. The sending fax device includes a data pump for modulating and demodulating fax information and a protocol subsystem for encoding and decoding the modulated fax information. The fax sending fax device modulates the fax information prior to transmission thereof. At least one access server is coupled between the sending fax device and the fax recipient and within the packet switching network At least one of the access servers receives modulated fax information from the sending fax device and demodulates the received fax information.

Abstract: In accordance with a method and apparatus of the present invention, a voice communication system is disclosed for use in a packet switching network environment including a host server for communicating voice information, initiated by a telephone user, to an electronic mail (email) recipient. A public switching telephone network (PSTN) includes at least one telephone device for communicating the voice information therethrough. The host server is responsive to email messages, transmitted in packet form, through the packet switching network The voice communication system includes a network device responsive to a voice message generated by the telephone user.

Abstract: In accordance with a method and apparatus of the present invention, a voice communication system is disclosed for use in a packet switching network environment including a host server for communicating voice information, initiated by a telephone user, to an electronic mail (email) recipient. A public switching telephone network (PSTN) includes at least one telephone device for communicating the voice information therethrough. The host server is responsive to email messages, transmitted in packet form, through the packet switching network The voice communication system includes a network device responsive to a voice message generated by the telephone user.

Abstract: An email communication system employed in a packet switching network environment for transmission of an email message including at least one fax message for use by fax recipient(s), through the packet switching network environment, includes a network device for communication with one or more mail servers. The mail servers are responsive to an email message having at least one tax message received from an email user. The network device receives the email message, through a forward connection, from one of the mail servers and converts the received email message into the fax message for transmission thereof to at least one fax recipient.

Abstract: A call fallback scheme is provided in a packet switched network. After receiving incoming calls, a Voice over IP (VoIP) link is established over a packet switched network with a destination endpoint. VoIP packets are generated from the incoming calls and sent over the VoIP link to the destination endpoint. When a low quality of service condition is detected on the VoIP link with the destination endpoint, a fallback call is established with the destination endpoint over a circuit switched network. The VoIP packets for the incoming calls are redirected from the VoIP link to the circuit switched data link. As opposed to simply hairpinning a TDM voice call back over the PSTN network 102, the same VoIP packets for the incoming calls originally destine for the destination endpoint over the packet switched network are rerouted through the fallback call. This simplifies synchronization with VoIP packets sent over the VoIP network.

Abstract: A call fallback scheme is provided in a packet switched network. After receiving incoming calls, a Voice over IP (VoIP) link is established over a packet switched network with a destination endpoint. VoIP packets are generated from the incoming calls and sent over the VoIP link to the destination endpoint. When a low quality of service condition is detected on the VoIP link with the destination endpoint, a fallback call is established with the destination endpoint over a circuit switched network. The VoIP packets for the incoming calls are redirected from the VoIP link to the circuit switched data link. As opposed to simply hairpinning a TDM voice call back over the PSTN network 102, the same VoIP packets for the incoming calls originally destine for the destination endpoint over the packet switched network are rerouted through the fallback call. This simplifies synchronization with VoIP packets sent over the VoIP network.

Abstract: An embodiment of the present invention includes a fax communication system for communicating fax information transmitted from a sending fax device to a fax recipient through a packet switching network. The sending fax device includes a data pump for modulating and demodulating fax information and a protocol subsystem for encoding and decoding the modulated fax information. The fax sending fax device modulates the fax information prior to transmission thereof. At least one access server is coupled between the sending fax device and the fax recipient and within the packet switching network At least one of the access servers receives modulated fax information from the sending fax device and demodulates the received fax information.