Abstract: A method for call signaling and media flow in a network including receiving call signaling information from an originating Voice over Internet Protocol (VoIP) endpoint relaying the call signaling information to a destination VoIP endpoint, directing the originating VoIP endpoint to use a RTP media proxy and receiving a stream of media to the RTP media proxy from the originating VoIP endpoint.

Abstract: An apparatus is provided for remotely managing various network elements of a Voice over Internet Protocol (VoIP) communication system. In general, an apparatus is described for communicating with different network elements of a VoIP communication system, receiving data from each network element, and storing the data. The apparatus includes a processor that communicates with different network elements of a VoIP communication system over a packet-switching network and queries the network elements for particular information. The processor receives and stores the data regarding each network element. In this way, data from multiple different network elements of a VoIP communication system may be remotely accessed and stored, and the data may be analyzed or manipulated to address system problems or monitor conditions of the system from the remote location. A method and computer program product are also provided for remotely managing various network elements of a VoIP communication system.

Abstract: An apparatus is provided for remotely rebooting Voice over Internet Protocol (VoIP) communication devices. In general, the apparatus remotely selects VoIP communication devices connected to a network, reboots the selected devices, and evaluates the status of each device. A processor allows a user to select VoIP communication devices connected to the network and receives inputs pertaining to the reboot operation, including a time input and search criteria. The processor communicates with the designated VoIP communication devices over a packet-switching network to instruct the devices to reboot and monitors each device. In this way, multiple VoIP communication devices may be rebooted from a remote location, and problems or issues that arise during the reboot process may be identified and addressed. An associated method and computer program product are also provided for remotely rebooting VoIP communication devices.

Abstract: A method for call signaling and media flow in a network including receiving call signaling information from an originating Voice over Internet Protocol (VoIP) endpoint, relaying the call signaling information to a destination VoIP endpoint, directing the originating VoIP endpoint to use a RTP media proxy and receiving a stream of media to the RTP media proxy from the originating VoIP endpoint.

Abstract: Routing calls through networks includes a device configured to support a first protocol for initiation, maintenance, and termination of a communication session between call endpoints, and to support a second protocol for resolving endpoint addresses for the communication session.

Abstract: A multiservice network for delivering enhanced communication services to customer devices attached to either the PSTN, such as telephones and fax machines, or devices attached to the Internet or private data networks, such as PCs or other IP devices, is presented. Enhanced services include IP-based faxing, IP-based telephony, IP-based conferencing, Internet call waiting, messaging services, such as unified messaging, and other advanced services such as find-me-follow-me, and desktop telephony. The multiservice network may be managed by a configuration manager for Internet telephony (COMIT).

Abstract: The present invention provides a system and method for establishing the availability of a node to received a voice over internet protocol (VoIP) call. The present invention comprises attempting to establish a VoIP call to a given node that is the target of the VoIP call, determining whether the attempt to establish the VoIP call is successful; and generating an alarm in response to a call failure. According to embodiments of the invention, the method may comprise extracting call metrics from a VoIP call that provide information regarding the quality of a VoIP connection and generating an alarm in response to the call metrics falling below a threshold.

Abstract: The present invention provides a system and method for establishing the availability of a node to received a voice over internet protocol (VoIP) call. The present invention comprises attempting to establish a VoIP call to a given node that is the target of the VoIP call, determining whether the attempt to establish the VoIP call is successful; and generating an alarm in response to a call failure. According to embodiments of the invention, the method may comprise extracting call metrics from a VoIP call that provide information regarding the quality of a VoIP connection and generating an alarm in response to the call metrics falling below a threshold.

Abstract: Routing calls through networks includes a device configured to support a first protocol for initiation, maintenance, and termination of a communication session between call endpoints, and to support a second protocol for resolving endpoint addresses for the communication session.

Abstract: A method for call signaling and media flow in a network including receiving call signaling information from an originating Voice over Internet Protocol (VoIP) endpoint, relaying the call signaling information to a destination VoIP endpoint, directing the originating VoIP endpoint to use a RTP media proxy and receiving a stream of media to the RTP media proxy from the originating VoIP endpoint.

Abstract: A system and methodology for qualifying a twisted pair copper loop for digital subscriber loop services are described. The system automatically queries telecommunications provider database records and/or requests measurements from network switching equipment or testing systems to obtain data regarding the twisted pair copper loop, such as loop length, electrical characteristics, and other loop topology characteristics such as wire gauge, the presence of load coils, and the presence of bridge taps. The system determines which digital subscriber loop services are available for the copper loop based on the combination of all data obtained. The system may be implemented in part as an expert system with a knowledge base of qualification rules used in the decision-making process.

Abstract: A method and apparatus is disclosed for signaling a switch of the target destination of a data packet having a header specifying the destination address and an information frame. The data packet along with a separate instance of the header is subcarrier multiplexed and simultaneously transmitted. The separate header is transmitted at a lower speed than the data packet permitting detection and processing by less expensive receivers.

Abstract: A fiber optical Y-junction device includes a l.times.N optical fiber coupler connected to N fiber optic amplifier module structures constructed from a doped optical fiber. When the optical Y-junction structure contains a fiber optic amplifier, the fiber optical Y-junction device is operable as either a modulator or lossless power divider. A nonblocking optical switch is constructed by coupling M.times.l optical fiber couplers to the outputs of the fiber optic amplifier module structures utilizing the fiber optical Y-junction.

Abstract: An optical preamplifier includes a semiconductor optical amplifier monolithically integrated with an optical detector and electrically isolated from the detector by an isolation region. The isolation region consists of a low-loss, preferably transparent, insulating material whose index of refraction is matched to at least the refractive index of the amplifier, leading to reduced facet reflectivity at the amplifier output facet. Alternative device structures may include a waveguiding layer in the isolation region, a grating integrated with or following the optical amplifier, and a tuning region positioned between the amplifier and isolation region for filtering spontaneous emission.

Abstract: A monolithically integrated optical preamplifier comprises an amplifying region, an optical detection region for detecting amplified light, and an optically transparent and electrically insulating isolation region interposed between the amplifying and optical detection regions. The amplifying region achieves reduced facet reflectivity by being designed to have a large spot size, single-traverse mode waveguide amplifier oriented at an angle with respect to a crystal plane through the preamplifier. The isolation region is preferably an air gap.

Abstract: A system for measuring the frequency response of an electrooptic device, such as an optical detector, includes an optical amplifier for generating an optical white noise spectrum that is delivered to the detector. In a first embodiment, an optical amplifier or a luminescent fiber amplifier generates a white noise signal due to spontaneous-spontaneous beat noise emission, while a second embodiment utilizes the signal-spontaneous and spontaneous-spontaneous beat noise emissions generated by an optical amplifier driven by a laser source. The frequency response of the detector is determined from a measurement of the detected noise signal wherein any roll-off in the response must be due to the detector since the originally generated noise spectrum is flat.

Abstract: A hybrid optical Y-junction device includes a 1.times.N optical fiber coupler connected to N waveguide structures fabricated on a single substrate. When the waveguide structure is a semiconductor optical amplifier, the hybrid Y-junction device is operable as either a modulator or lossless power divider. A nonblocking optical switch is constructed by coupling M.times.1 optical fiber couplers to the outputs of the waveguide structures in the hybrid Y-junction. The switch is also effective as a wavelength division multiplexer when periodic gratings are integrated into the waveguide amplifiers.

Abstract: A novel method for reducing the facet reflectivities of semiconductor light sources and amplifiers concerns the use of a bulk (non-waveguiding) index-matched regrown end cap region at both of the major facet surfaces of the amplifier. The amplifier has a tilted stripe geometry which, in combination with the end cap regions, enable the amplifier to reproducibly achieve facet reflectivities of less than 10.sup.-5 while avoiding a facet coating step. The improved optical amplifier is more amenable to mass production and less sensitive to both wavelength and polarization.

Abstract: Mechanical translation tips can be attached to a fiber version of a frequency chirped interferometric displacement sensor. The mechanical tips can be used in noisy or deleterious environments that preclude the use of non-contact optical sensors. These tips can also be used with a hydraulic amplifier to increase the resolution of the sensor to less than one micron.