Abstract: A non-blocking broad band asynchronous transfer mode (ATM) switch having a plurality of ports is adapted to provide a switching function for narrow band traffic by means of adaptive virtual junctors attached to the switch ports to provide ingress to and egress from the switch and each having means for assembly and disassembly of ATM payloads. Each adaptive virtual junctor has a virtual connection with every other adaptive virtual junctor, each said virtual connection comprising a number of virtual circuits. Control means associated with each said adaptive virtual junctor determine on a call by call basis the number of virtual circuits on each virtual connection associated with that adaptive virtual junctor. A semi-permanent pool of capacity may be provided by transmission adaptation devices associated with the adaptive virtual junctors.

Abstract: A digital cordless telephone system comprises a multiplicity of subscriber cordless handsets (HS's) with a subscriber number of a private automatic branch exchange (PABX) being assigned to one or more of the HS's, a plurality of base stations (BS's), each of the BS's being coupled with one or more of the HS's by radio channels for controlling a radio link between each of the BS's and each of the HS's, and a system connecting unit coupled with the BS's and the PABX for allowing only authenticated HS's to initiate outgoing calls and for keeping track of each of the HS's to set up calls for the HS's whenever the HS's are within the service area of one of the BS's.

Abstract: Method for controlling usage of phone debit cards and an associated telephony system which incorporates the same. A switch receives requests to complete telephone calls to destination terminals and to assess fees associated with the requested telephone calls to a phone debit card account. Upon receipt of such a request, the switch asks an SCP to verify that the account is valid and has sufficient credit to complete the requested call. Upon being advised of the same, the switch completes the call. The switch then requests that the SCP deduct the cost of a first minute of the call from the account. When the switch has been advised that the cost of the first minute has been deducted from the account, the switch sets a timer. If the call is continuing when the minute expires, the switch will request that the SCP deduct the cost of the next minute from the account.

Abstract: Method of signal processing application graphical entry with the aid of a digital computer.

Abstract: A method and system is disclosed for triggering handoff of a call from a CDMA network to an AMPS network on which it is overlaid responsive to a determination that the CDMA RF link has degraded to such an extent that the call quality will be degraded significantly or the call is likely to be dropped is disclosed.

Abstract: According to this method for transmitting a digital signal by a base station equipped with a multi-element antenna to a mobile, in the presence of interference sources and background noise, at least one frequency transposition operator is calculated which approximately transforms one reception calibration table into one transmission or reception calibration table; statistical data are calculated on the basis of the signals received by the various elements, originating from the mobile and the interference sources; for this mobile, an optimum set of spatial weightings is calculated on the basis of the statistical data, the frequency transposition operator, and a criterion for reinforcing the useful signal and reducing the interference sources; the digital signal is weighted on the basis of the optimum set of weightings, then it is transmitted.

Abstract: A cellular telephone, in its most preferred embodiment, performs a method for notifying a digital cellular telephone user of an imminent communication disconnection. The preferred method includes, at least, generating at least one condition indication representative of at least one communication condition, analyzing the condition indication, determining whether a communication disconnection is imminent, enhancing quality of received communication signals when possible, and notifying the user of an imminent communication disconnection. Exemplary condition indications include, at least, continuous count and rate indications of frame checksum errors, insufficient quality frames, symbol errors, and chip errors, output power level indication, received signal strength indication, soft handoff status indication, other pilot signal indication, and current pilot signal strength indication.

Abstract: The present invention relates to radio communications antennas. A wide band omnidirectional dipole antenna is described comprising a dipole antenna having first and second quarter wavelength dipole arms, a transmission line from input termination point having a ground and a central conductor; wherein the central conductor is connected to a centrally located feed point on the first dipole arm by the transmission line and the second dipole arm is connected to ground and acts as a ground plane for the transmission line. The present invention can be deployed in fixed and mobile wireless terminals and associated therewith. The antenna design can provide a cost effective solution to many applications.

Abstract: The invention relates to an optical transmission system that implements encrypting of an information carrying signal by deterministic chaos. The system includes a transmitter (1), a receiver (4), and one transmission channel coupled between the transmitter (1) and the receiver (4). The transmitter (1) includes a deterministic chaos generator (3) coupled to an encoding system (2). The deterministic chaos generator (3) includes a wavelength tunable laser-emitting diode (33) and a feedback loop (34). The active layer of laser diode (33) is offset controlled by a laser signal passed through a non-linear optical element (32) and a delay line (31). The receiver (4) has a deterministic chaos generator (7) coupled to a synchronizer (6) and a decoder coupled to the synchronizer (6). Preferably, chaos generator (3) is the same as chaos generator (7). Other features are disclosed.

Abstract: A management base of a communications network manager is constructed using object oriented techniques. A network comprises a plurality of physical resources in the form of components and assemblies of components, which are distributed across the network. A management system for the network is constructed in an evolutionary manner by representing an overall functionality of the network by an application model in which each function of the network is modeled independently of its implementation, decomposing the application model into an implementation model in which every function represented in the application model is represented in the implementation model, representing the application model as a plurality of objects, representing the implementation model as another plurality of objects, connecting the objects of the application model and implementation model together to obtain a combined object model, and constructing a management base according to the combined object model.

Abstract: A process for renegotiating, during a communication, the parameters of a traffic contract on an ATM network.The present invention relates to a renegotiation process, during a communication on an ATM network, of the parameters of the traffic contract that relates to this communication. It is characterized in that it consists:a. in predicting, for a predetermined period of time between two successive renegotiations, the maximal length that would be reached by a virtual file fed by the traffic of said communication, for at least a given thruput rate of said file.b. in deducing from said maximal length one or more new parameters for the traffic contract, andc. in renegotiating with the network on the basis of said (new) traffic parameter or parameters for said period of time.

Abstract: In a TDM communications system comprising a base station and a number of outstations, a marshalling signal enables a newly connected outstation to determine the timing of its transmission bursts A detector circuit for recovering the marshalling signal incorporates comparators whose thresholds are adjusted to the high and low levels of the normal data signal. The marshalling signal is recovered from one or other of the comparators according to whether a high or low normal data signal is received, this condition being determined by a third comparator whose threshold is adjusted midway between the high and low level. This allows the marshalling signal to be recovered continuously without interrupting normal data transmission from the outstation.

Abstract: An algorithm or method for ascertaining minimum cellular system costs is presented based on the recognition that the proper distribution of wired network blocking probability is the prime consideration in optimizing system design for minimum cost. System costs are calculated for each of a series of VCs maximum blocking probabilities "b" wherein the total wired network blocking probability is "BP" and the channel element blocking probability for each of those calculations must not exceed "(BP-b))/(1-b)". An examination of the resulting calculations will then reveal the appropriate distribution of resources to minimize costs.

Abstract: An optical fiber amplifier is disclosed including: an optical line through which an optical signal is transmitted; a rare-earth-doped fiber, doped with a predetermined rare earth ion, being set on the optical line; a pumping light beam source for generating a pumping light beam having a predetermined wavelength; a first multiplexer for coupling the pumping light beam to the optical line; a second multiplexer for dividing the pumping light beam outputted from the rare-earth-doped fiber; and pumping light beam looping means for looping the pumping light beam divided by the second multiplexer back to the rare-earth-doped fiber. The residual pumping light beam outputted from the rare-earth-doped pumping light beam is looped back by the feedback loop or reflection loop, to be reprovided to the rare-earth-doped fiber through the multiplexer.

Abstract: A method and an apparatus for selecting a cellular carrier frequency for accessing cellular airtime services based upon a list of preferred system identification codes (SIDs). A cellular telephone is programmed to accept into memory a list of preferred SIDs corresponding to carriers through which service is preferred. While any SID remains in a preferred list, the standard A/B system selection function is replaced by a substitute system selection function which includes only three carrier selection modes including the Home Only mode, the SID Only mode, and a Roam Saver mode. With the Roam Saver carrier selection mode, the cellular telephone first prefers service through a home carrier and then through a carrier broadcasting a SID matching a SID on the preferred list, but never denies service to emergency or non-emergency destinations if any SID is detected.

Abstract: A billing scheme for a telecommunications network is described in which a billing record for a call including at least a plurality of data bytes is generated in a switch (10), each billing record is duplicated, and check information is generated from each data byte of a billing record and associated with each said data byte to form a protected billing record. Each protected billing record of a duplicated pair is transmitted via two independent transmission lines to processing means (40, 50) in which the associated check information is generated byte-for byte from each received billing record and the generated check information is compared byte-for-byte with the transmitted check information in parity checking circuits (60, 61). If for any one byte of a billing record, the generated check information does not agree with the received check information, that billing record is discarded.

Abstract: An antenna arrangement (10) for a cellular radio base station is provided with a plurality of r.f. transceivers, including one or more antenna arrays (12) each comprising a plurality of sub-arrays (20) each selectively operpable to form a beam in azimuth. Each sub-army is provided with elevation beamforming means (24) and individual transmit and receive amplifiers (30,32). Each sub-array beamformer is coupled to at least one r.f. transmitter feed (26)nd each r.f. receiver feed is coupled to at least two sub-array beamformers, the sub-arrays of each antenna array together forming a multiplicity of separate substantially coincident beams in azimuth. A method of operation is also disclosed.

Abstract: A method for protocol negotiation between an originating call handler and a terminating call handler, both of which reside within a switching node of a telecommunications network. A call initiated by an originating agency is transmitted to the originating call handler. The originating call handler transfers the call to the terminating call handler which completes the call to a terminating agency. Prior to transfer between handlers, a transfer protocol is determined. If the originating and terminating call handlers share a common native protocol, the common native protocol is selected for transfers therebetween. If the handlers do not share a common native protocol, the native protocol of the originating call handler is selected for transfers therebetween if a non-native protocol of the terminating call handler matches the native protocol of the originating call handler.

Abstract: A device for collective optical coupling between a single-mode fiber bundle and an electronic module in the optical telecommunications field which includes joining the single-mode fiber bundle to a graded-index fiber bundle and fracturing the fibers of the graded-index fiber bundle so as to produce graded-index fiber sections in order to form a lens at each end of the single-mode fibers.

Abstract: A method for implementing variable rate optional security measures in a wireless communications network, the communications network having a plurality of nodes for communication with mobile subscribers, includes the following steps. A capacity constraint of at least one node of the network is first determined. A load list is dynamically maintained for each node as a function of the capacity constraint, the load list indicating any overload states of the nodes. Lastly, at least one optional security measure is performed on the network as a function of the load list, wherein the at least one optional security measure is selected from a plurality of optional security procedures. An apparatus for implementing variable rate optional security measures in a wireless communications network is also disclosed.