Abstract: A system and method for selective regression testing of a software system that determines which test units of a test suite must be re-run after a modification to the software system. The entities which are covered by each test unit are identified. When the software system is modified the entities which were changed by the modification are identified. The test units which need to be re-run are determined by analyzing the change information and the coverage information to select those test units that cover changed entities.

Abstract: An image of an object, such as message for facsimile transmission, is acquired optically by setting photosensitive cells along a multiplicity of rows and columns of a random access memory to a given value such as 1, exposing the plurality of cells to an image so the cells change electrical values to exposure values, and after a given time, ending the effective exposure by maintaining values in the cells corresponding to the exposure content of the cells. The maintaining involves going in sequence from row to row, and in each row simultaneously reading the cells in the row and, on the basis of the reading, writing refresh values representative of the exposure values back into the read cells of the row, and repeating the row to row sequence cyclically to prevent changes in the cells due to further exposure. The refreshed data is processed by sequentially reading the refresh values of the cells of a column serially from column to column until all the values have been processed.

Abstract: A multi-chip module (10), having n semiconductor chips 14.sub.1 -14.sub.n, each chip having a Boundary-Scan architecture, is rendered Boundary-Scan-compliant both as a circuit board and as a macro-device by the addition of a bypass circuit (36, 36' and 36"). During selected intervals when the module (10) is to be Boundary-Scan-compliant as a macro-device, the bypass circuit operates to bypass the Test Data Input (18) to the Test Data Output (34) of each of n-1 chips. During other than the selected intervals, the bypass circuit allows test information applied to the Test Data Input of each of the chips to be shifted through the chip and to appear at its Test Data Output to facilitate Boundary-Scan compliance of the module as a circuit board.

Abstract: A telecommunication network serves first subscribers by a first Centrex telephone exchange (CTX) via a first telecommunication switch. A first signal is received at the first switch from the first CTX which indicates that call origination services are to be provided directly by a second public network switch for a first subscriber. The second switch is disposed at a hierarchical level above the first switch. A second signal is received at the second switch from the first CTX indicative of the identity of the first subscriber. A record is located in a database coupled to the second switch based on the identification of the first subscriber. A group affiliation parameter stored in said record is identified; the group affiliation parameter defines one organization of which the first subscriber is a member.

Abstract: A telecommunication network includes a first local exchange carrier (LEC) switch that provides service to first subscribers. A first signal from the first switch is received at a second telecommunication switch disposed at a hierarchical level above the first switch. The first signal indicates to the second switch that call origination services are to be provided directly by the second switch for one of the first subscribers. A second signal is received at the second switch via the first switch indicative of the identification of the one first subscriber. A record in a database coupled to the second switch is located in response to receiving the second signal. A group affiliation parameter stored in said record is identified; the group affiliation parameter defines one organization of which the one first subscriber is a member. The second switch transmits a call setup message to a third switch associated with the second subscriber.

Abstract: An unbundling apparatus to permit competitive access providers access to telephone lines connected to a remote terminal, and the ability to control and test such lines. Such unbundling apparatus includes a switch fabric, a command module, and a testing module. The switch fabric provides all voice channel connections between all switches and the remote terminal and grooms the control channels. Control messages are switched into the command module, which performs any protocol translations necessary. All commands from switches are then multiplexed and sent back to the switch fabric, which routes them to the original command channel to the remote terminal. Control messages from the remote terminal are demultiplexed, translated (if necessary) and sent to the switch fabric for delivery to the appropriate switch. Testing of lines is also provided to all competitive service providers.

Abstract: Methods of establishing multimedia conferences between a multimedia server and a plurality of endpoint devices. One or more of these endpoint devices are enhanced in that they include a memory adapted to store one or more telephone numbers, each telephone number corresponding to a respective endpoint device, and a user interface coupled to the memory for selecting a telephone number stored in the memory. The methods are performed in a substantially continuous manner, signifying that a third endpoint device is added to a preexisting conference between a first and a second endpoint device without substantially interrupting this preexisting conference. Therefore, a seamless multimedia conference is provided between the first and second enhanced endpoint devices even when a third endpoint device is added to the conference.

Abstract: In accordance with the invention, an optical fiber is made by the steps of providing an optical fiber preform having a longitudinal axis, rotating the preform about the axis, directing onto the preform a plasma torch which is reciprocated over a limited region parallel to the axis to define a heated region, and drawing a fiber from the heated region. Apparatus for making optical fiber comprises a rotatable mount for securing one end of a preform and rotating it about a vertical axis, a plasma torch for heating a drawing region on the preform, a positioning stage for moving the torch parallel to the vertical axis in a reciprocating manner, and a fiber drawing apparatus for drawing a fiber from the heated region of the preform.

Abstract: An optical monitor tap in fiber optical amplifiers is achieved in a configuration with internal input signal monitoring taps, in accordance with the principles of the invention, by placing the tap some distance into the actual optical amplifier active fiber. This allows the system to minor the integrity of the amplifier without impairing the quality of the associated signal. In an illustrative embodiment of the present invention, the amplifier is generally comprised of a long piece of rare-earth material doped fiber to which a fiber optic pump source is coupled via a wavelength divisional multiplexer (WDM) coupler. The tap is placed at some distance from the input of the fiber amplifier. The distance should be small enough such that there has been amplification of the signal but not so much as to have the signal saturated or compressed.

Abstract: A semiconductor chip (10) has a plurality of metallized members (12) that are each advantageously bumped with a volume of gallium amalgam (18) to render the members wettable by a conventional solder.

Abstract: A multi-media messaging system (101) allows message recipients who lack full-motion video message-retrieval capability to retrieve at least some image content of video messages via video snapshots--image frames retrieved as still images. The system determines (302) the video capability of the recipient's terminal. If it is not full-motion video, the system plays back (320) only the soundtrack of the video message and monitors (400) the recipient's input for a snapshot request. Upon receipt of a snapshot request, the system captures (402-410) the image frame of the video message that corresponds in the video message to the point in the playback of the soundtrack at which the request was made and converts the frame from moving-image format to still-image format. If the recipient's terminal's video capability is slow video, the system sends (432) the converted frame to the recipient's terminal during simultaneous or interrupted playback of the soundtrack.

Abstract: A low noise optical fiber Raman amplifier (FRA) comprises an upstream and a downstream length of silica-based amplifier fiber, of combined length >200 m, typically >1 km, with an optical isolator disposed between the upstream and downstream lengths of amplifier fiber such that passage of backscattered signal radiation from the latter to the former is substantially blocked. In preferred embodiments counter-propagating pump radiation is coupled into the downstream length of amplifier fiber, and wavelength-selective means are provided for shunting the pump radiation around the optical isolator. The described FRA is advantageously incorporated into optical fiber communication systems. Exemplarily it can serve as power amplifier, as pre-amplifier, or as in-line amplifier. For instance, it can be used to replace conventional opto-electronic repeaters in existing 1.3 .mu.m fiber communication systems, or it can be used as power amplifier in a multi-subscriber optical fiber CATV system.

Abstract: An optical fiber communication system according to the invention comprises an optical fiber filter that can be manufactured at low cost and that can be conveniently incorporated into the system, substantially like a conventional fiber jumper. The filter comprises a length L of axially uniform optical fiber selected to have substantially no loss (e.g., <1 dB) at a wavelength .lambda..sub.1, and to have relatively high loss (e.g., >20 dB) at a wavelength .lambda..sub.2. The length L will typically be less than 100 m. In one embodiment the optical fiber is a single mode optical fiber at .lambda..sub.1 (e.g., 1.3 .mu.m) that does not have a guided mode at .lambda..sub.2 (e.g., 1.55 .mu.m). In another embodiment the fiber contains a dopant that does substantially not absorb radiation of wavelength .lambda..sub.1, but substantially absorbs at .lambda..sub.2. In the second embodiment, .lambda..sub.1 can be greater than .lambda..sub.2.

Abstract: A telecommunication network supports subscribers and recognizes a request for call origination by a calling party on an associated communication line. A first record in a database is located based on the identification of the calling party's line. A first set of predetermined features is determined based on information contained in the first record. A personal identification number of the calling party is received. A second record in a database is located based upon the PIN; the second record is independent from the first record. A second set of predetermined features is determined based upon information contained in the second record. The set of features made available to the calling party is determined based on a consideration of the total set of call features in the first and second sets of features.

Abstract: Signal reconstruction methods reconstruct a missing portion of a signal from a first known portion of the signal preceding the missing portion, and a second known portion of the signal succeeding the missing portion. The first known portion of the signal is represented using a first autoregressive model and the second known portion of the signal is represented using a second autoregressive model. These methods construct a signal estimate from the first and second autoregressive models, thereby permitting the reconstruction of any signal having a missing portion, irrespective of whether or not the length of the missing portion is greater than the short-term stationarity duration of the signal.

Abstract: The invention relates to a transmission system for transmitting and detecting the beginning of the frame of a frame synchronized signal, which comprises a first and a second detection circuit (1, 2) and an evaluation circuit (3). The first detection circuit (1) is provided for setting a first detection signal (D1) to a first state upon detection of a first bit sequence located at the beginning of the frame of the signal, and the second detection circuit (2) for setting a second detection signal (D2) to a first state upon detection of a second bit sequence located at a specific frame position of the signal.

Abstract: Transient enhanced diffusion (TED) of dopants is reduced by bring the surface closer to the implant damage prior to the annealing process.

Abstract: In accordance with the invention, an EMI suppressing connector comprises a body of ferrite having a plurality of conductive channels and at least one planar surface. The channel walls are wholly or partially coated with conductive material which provides a conductive path extending through the body and the planar surface includes a pattern of coated conductive leads connected to the conductive channels. Preferably the connector is in the form of a rectangular parallelopiped, and the channels extend perpendicularly between two major surfaces. In one embodiment, the conductive material extends horizontally through the body and onto planar bottom. The conductive material on the planar bottom surface provides ready connection with contacts on a circuit board or IC package. In another embodiment, the conductive material extends vertically through the body and onto a planar bottom or top.

Abstract: The invention relates to the use of CDMA techniques. Data signals to be transmitted from a plurality of wireless devices are spread across a common bandwidth. The data signals are received by a base station as a composite spread signal. The base station partially despreads the composite spread signal with unique codes to extract data signals from individual wireless devices. The data rate and quality of service requirements for each wireless device are used to calculate a power factor and a control signal is sent to control the power from a particular wireless device. In addition, a probability of transmission value is calculated based on an equivalent current load value and an equivalent population value. The probability of transmission value determines whether a particular wireless device is allowed access to an uplink frequency channel.