Abstract: A network shelf is disclosed for connecting a number of devices together. The shelf includes a backplane having multiple device slots. It also includes multiple links connected to each device slot. Each of the device slots is normally connected to at least one of the other device slots through at least one of the links. The limit on the number of devices being connected together in a full mesh configuration is one more than the number of links on a given device slot.

Abstract: A system and method of providing a terminator telecommunications unit with the geographic location of a mobile telecommunications unit, where the terminator unit may then provide directions to the mobile unit in voice format or non-voice data format so the mobile unit can use the directions to arrive at the location of the terminator unit.

Abstract: A method of frame synchronization for OFDM point-to-multipoint channels is provided according to a first aspect of the invention, wherein sequences of reference frames are inserted at prescribed intervals between sequences of information frames. Each frame comprises a cyclic prefix, composed of two identical segments of data, which is used for locating a frame synchronization starting point by applying a subtraction function on the two segments of data for locating the starting point at the location of the minimum of the function. A method of channel equalization for OFDM channels is also provided according to a second aspect of the invention, wherein the reference frames and data known to a receiver are used for creating an equalization vector for correcting broadcast errors of the information frames received at the receiver side.

Abstract: A host DBMS simulator and simulation method thereof which can simulate an exchanger application program made out into CHILL/C in one's host system by a user using a host system under the exchanger's execution environment and similar simulation environment. A simulator is provided which can directly simulate an exchanger application software not on an exchanger main but on a host system. The exchanger has a problem of limit of resources consumption which cannot simulate the execution blocks of loaded application software with multi-users' interconnection simultaneously. Because of achieved of the package form of one unite performance environment, in the case that one user simulates in the exchanger, it is difficult that there cannot be performed a simulation in the case of adding new functions, changing, connecting the existing function. However, there is an effect which can solve by providing an environment which can load various databases as an administration command provided in the present simulator.

Abstract: A holder for a mobile telephone is provided, which includes a main body to which a mobile telephone is magnetically attached, and an angle controllable attachment supporting means for attaching the main body to the surface of an object such as a vehicle dashboard. The magnetic attachment means includes a magnet fixed to the main body, and a piece of iron attachable to the back of the mobile telephone and attachable to the magnet by magnetic force. The angle controllable supporting means comprises a pair of independently moveable hinge-connected supports which are also hinge-connected to the bottom of the main body. The main body can be attached to the dashboard of a vehicle without regard to the curvature of the surface of the dashboard, and the mobile telephone can be securely attached magnetically and easily separated from the holder.

Abstract: A dielectric ceramic composition for a microwave device including MgTiO.sub.3 and CaTiO.sub.3 as a main component and a Li.sub.2 CO.sub.3 as a sub-component is provided. The composition being expressed as follows: (94MgTiO.sub.3 -6CaTiO.sub.3)+xLi.sub.2 CO.sub.3 (mol %), where 0.2.ltoreq.x.ltoreq.0.8 (mol %). Therefore, it is capable of increasing a quality factor and decreasing a sintering temperature by adding a new component and effectively reproducing the above-described dielectric characteristic.

Abstract: An apparatus and method for allocating a data path during a call by establishing a first network call segment associated with an agent and sending a message with routing information across a tandem link using predetermined signaling paths. A second embodiment of the invention comprises a method of allocating a data path during a call wherein the datapath is also a voice path. A third embodiment of the present invention additionally includes apparatus and method for allocating a data path during a call including establishing a two-way connection.

Abstract: The variables and parameters previously understood to affect the gain spectrum of an optical amplifier 13 were: (1) the wavelengths to be amplified; (2) the input power levels at those wavelengths; (3) the characteristics of the amplifying medium 20; (4) the insertion loss spectra of the amplifier's components, including any filter(s) used for gain flattening; (5) the pump band chosen to pump the amplifying medium 20; and (6) the total amount of pump power supplied in the chosen pump band. An additional fundamental variable has been identified which can be used to control the gain spectrum of an optical amplifier 13, namely, the center wavelength of the spectrum of the pump's output power within the chosen pump band. Methods and apparatus for using this variable for this purpose are disclosed.For example a, transmission system is disclosed having a transmitter 11 and a receiver 10 connected by an optical fiber 12.

Abstract: A superimposed grating tunable WDM semiconductor laser is provided comprising a grating structure is a binary superimposed grating comprising a plurality of segments of equal dimension, s, each segment having one of two values of refractive index, whereby the grating structure is provided by a binary modulation of the refractive index modulation of segments s along the length of the grating.Thus, for a superimposed grating structure for an optoelectronic device for providing a spectrum comprising j reflection peaks at wavelengths .lambda..sub.j, the grating comprising a binary superimposed grating (BSG) having a sequence of a plurality of segments of equal size s, each segment of the sequence having a refractive index of one of two values wherein the effective waveguide index of the ith segment n.sub.i.sup.0 (.lambda.) is allowed to be changed by .DELTA.n.multidot.(m-1/2) with m=1 or m=0: ##EQU1## where i=1,2,3 . . . is the segment number, for digital position i.multidot.s, n.sup.0 (.lambda.

Abstract: Optical semiconductor light guide device having a low divergence emergent beam, application to Fabry-Perot and distributed feedback lasers. According to the invention, the core of the guide of the device comprises at least one semiconductor layer (8), whose refractive index is higher than that of each of the confinement or cladding layers (4, 6) of the guide and at least one second semiconductor layer (10), whose refractive index is lower than that of each of the confinement or cladding layers or close thereto. Application to optical telecommunications.

Abstract: An electrically written memory element utilizing the motion of protons within a dielectric layer surrounded by layers on either side to confine the protons within the dielectric layer with electrode means attached to the surrounding layers to change the spatial position of the protons within the dielectric layer. The device is preferably constructed as a silicon-silicon dioxide-silicon layered structure with the protons being introduced to the structure laterally through the exposed edges of the silicon dioxide layer during a high temperature anneal in an atmosphere containing hydrogen gas. The device operates at low power, is preferably nonvolatile, is radiation tolerant, and is compatible with convention silicon MOS processing for integration with other microelectronic elements on the same silicon substrate. With the addition of an optically active layer, the memory element becomes an electrically written, optically read optical memory element.

Abstract: An ISDN primary rate interface circuit having a plurality of communication channels, includes a channel division controller. According to predetermined conditions, the channel division controller selects a communication channel out of the plurality of communication channels when generating or receiving a call. The channel division controller provides private branch exchange by enabling allocation of the selected communication channel to an extension group according to a predetermined condition when generating or receiving the call.

Abstract: In a synchronous fixed frame boundary system with variable data rates, a transmitter inserts into a current frame an indication of the data rate of the next frame. After the first frame is received and processed at a receiver, the variable data rates of subsequent frames are known before processing, thereby reducing processing load. Furthermore, because the rate indication is inserted into the frame to be error protected along with the rest of the frame information, reliability is high, while additional data overhead and complexity are very low. For example, North American code division multiple access (CDMA) digital cellular telephone systems and personal communication system (PCS) utilize variable data rate transmissions. As a station modem (SM) assembles a current frame for convolutional encoding and further processing, the SM inserts a rate indication for the subsequent frame in accordance with information from a vocoder and CPU of the appropriate data rate for the subsequent frame.

Abstract: A telecommunications call routing device provides call routing based on digits received at the device from an exchange. The routing device has the facility to route by one of a plurality of networks, including both private networks and public networks, and to force calls to be placed over a private network if a route is available. Early reconnection of calls is also possible by monitoring call progress tones, measuring the pauses between dialed digits and reconnecting the exchange to a network or PBX as soon as the routing decision is made.

Abstract: A wireless telephone is additionally operable in a voice data interface mode in which voice (sound) data is output from the wireless telephone for communication over a data network, such as, for example, the Internet. In the voice data interface mode, voice audio signals detected through a wireless telephone microphone are converted into data for transmission through the data network, and, likewise, voice data received by the wireless telephone from the data network, or sound data simply generated by a connected PC, is converted into audio signals and output through a wireless telephone speaker. In one embodiment, a wireless telephone with voice data interface functionality is serially connected as a peripheral device to a local PC which is also connected to an Internet service provider (ISP) through land lines, and in another embodiment, through the wireless telephone itself.

Abstract: An improved mediate server and real time delivery method between different networks which is capable of receiving various video services on the low speed Internet in real time after a predetermined time, and by which it is possible to receive various video services based on the service reserving system, which includes a service browser directly connected to a high speed network server for transferring a server address, service type, and selection list by receiving a service browsing request from a user when a selection is received from the user, receiving a result whether a mediate function is needed, and providing a service, a real time controller for transferring a result to the service browser when there is not a mediate function by judging whether the mediate function is needed by receiving a server address, service type, and selection list from the service browser, determining the buffer size after measuring a traffic based on the connection to the server when the mediate function is needed, allocating t

Abstract: A method and apparatus for a relatively meaningful search and/or link operation to be performed within and/or between one or more electronic documents. According to one aspect of the invention, a method and apparatus is provided for extracting and storing text, image and/or location information of an electronic document. According to another aspect of the invention, a tag may be specified as label for a set of search and/or link (e.g., source and target) parameters, each having a set of "rules" associated therewith, for searching the stored text, image, and/or location information. According to yet another aspect of the invention, the set of parameters may include context (e.g., specified character/text patterns that may occur within and/or adjacent to one or more specified patterns) and/or location (e.g., a page number/range, a box on a page, a filename, tag, character/line offset, etc.) information/rules.

Abstract: A bit of a data signal is encoded with a value of a transmission clock signal if the bit corresponds to a zero. If the bit corresponds to a one, then the bit is encoded with an inverse of the value of the transmission clock signal. After transmission, the encoded signal is decoded by a counter and a comparator. The counter samples the encoded bit of the data signal into a plurality of sampled signals and inverts a portion of the sampled signals. The counter counts the number of sampled signals corresponding to a particular value such as a one or zero. When most of the sampled signals correspond to the particular value, a comparator outputs a decoded signal having a value corresponding to the particular value. When most of the sampled signals do not correspond to the particular value, the comparator outputs a decoded signal having a value corresponding to an inverse of the particular value.