Abstract: A network prevents unauthorized users from gaining access to confidential information. The network has various workstations and servers connected by a common medium and through a router to the Internet. The network has two major components, a Network Security Center (NSC) and security network interface cards or devices. The NSC is an administrative workstation through which the network security officer manages the network as a whole as well as the individual security devices. The security devices are interposed, between each of workstation, including the NSC, and the common medium and operate at a network layer (layer 3) of the protocol hierarchy. The network allows trusted users to access outside information, including the Internet, while stopping outside attackers at their point of entry. At the same time, the network limits an unauthorized insider to information defined in their particular security profile. The user may select which virtual network to access at any given time.

Abstract: An EMI shielded telecommunications equipment enclosure includes a metal cabinet structure and an access panel. The cabinet structure defines a compartment configured to contain electrical equipment that emits and is susceptible to EMI. An edge portion of the cabinet structure defines a peripheral boundary of an access opening for the compartment. The access panel includes a metal panel structure which overlies the edge portion of the metal cabinet structure when the access panel is closed. The apparatus further includes a layer of electrically nonconductive material which is interposed as a dielectric between the metal panel structure and the edge portion of the metal cabinet structure when the access panel is closed. In this configuration, a low capacitive impedance path for EMI shielding is provided between the access panel and the metal cabinet structure.

Abstract: A method for avoiding interference in a wireless telecommunication system is provided. The method includes providing communication between a first and second component at an initial frequency. A plurality of successive line quality indicators is determined at a line quality monitor of the first component. Consecutive line quality indicators are summed over a predetermined time to determine a slow hop count. A determination is made as to whether the slow hop count is greater than a slow hop threshold. A determination is made as to whether to provide communication with the first component at a second frequency when the slow hop count is greater than the slow hop threshold. This determination is based on a power level of the second component and a communication strength received from the second component at the first component. A signal is communicated from the first component to the second component requesting the second component to provide communication at the second frequency.

Abstract: The push-button switch has a base plate, a circuit membrane, a key cap, a scissors-type linkage and a resilient element. The scissors-type linkage having a first linking bracket and a second linking bracket is disposed between the circuit membrane and the key cap and movable along a specified path. The resilient element is mounted on the scissors-type linkage so as to move the key cap and the scissors-type linkage back to the initial state as the force applied on the key cap is released. The scissors-type linkage is provided with a guiding portion thereon, and the resilient element has a trigger, which is actuated by the guiding portion and used to trigger the switch as the key cap is fully pressed. The resilient element also can be a V-shaped reed connected to the first linking bracket and the second linking bracket, or the resilient element can be a spring connected to the first linking bracket and the second linking bracket.

Abstract: Apparatus, and an accompanying method, for transmitting a frame synchronization signal and a data signal simultaneously through a serial transmission medium (170). Specifically within a data transmitter (105), a frame synchronization signal, a clock signal and a data signal, are encoded to form a single bi-phase mark signal having the frame synchronization signal incorporated into the bi-phase mark signal as a phase-shift. The bi-phase mark signal is then transmitted through a suitable serial transmission medium. A receiver (175), connected to the transmission medium, receives and amplifies an incoming bi-phase mark signal appearing on the medium, and, in turn, synthesizes the clock, frame synchronization, and data signals from this bi-phase mark signal.

Abstract: A system and method for silent Automatic Call Distributor (ACD) call monitoring in a telephony-over-LAN environment includes an ACD agent terminal for handling incoming calls from customers. A first call between the agent terminal and a customer terminal includes agent voice data and customer voice data. After the agent terminal has set up the first call with the customer terminal, the agent terminal receives a monitoring call setup request from a supervisor terminal. In response to the call setup request, the agent terminal cooperates with the supervisor terminal to establish a monitoring call over which the agent terminal transmits the agent voice data and the customer voice data to the supervisor terminal. The agent terminal monitors the first call for simultaneously transmitted agent voice data and customer voice data.

Abstract: A reduction method of successive hard handoffs which prevents the call from dropping and the communication quality from deteriorating which are caused by the successive hard handoffs frequently occurring between base stations according to the system resources in the CDMA mobile communication system is disclosed. The reduction method includes the steps of making a decision on soft or hard handoff possibility according to the strength of the pilot signals of the existing base station holding a current call and the newly added base station by using the pilot strength measurement message received from the mobile station, informing the control station of the resource assignment possibility of the added base station by using the handoff request message transmitted from the control station to the added base station, and performing or completing handoffs according to said resource assignment success or failure.

Abstract: In a radio paging system wherein a user carrying a radio paging receiver is paged by means of radio waves, and the radio paging receiver sends back a response signal when it has received a paging signal addressed to itself, the response signal is sent back by means of direct sequence modulation using a code uniquely determined in accordance with the base station ID signal, which is different for each base station, and which has been inserted in the paging signal sequence transmitted from the base station, or in accordance with the order of each paging signal within the paging signal sequence. As a result, the response signal can be transmitted at low power from each radio paging receiver, and effective utilization can be made of frequency, regardless of an increase in the number of radio pagers.

Abstract: The invention provides a cost-effective system and method for testing telephone lines connected to transmission systems, such as Subscriber Line Multiplexer systems. The invention uses the same pair of wires for transmission and test. According to one embodiment of the invention, a system for allowing a test procedure to be performed on a communication system is provided. The communication system has a transmission line for connecting to telephone exchange and a subscriber line for connecting to a communication set. In the system of the invention, a detector is coupled to the transmission line for detecting test signals on the transmission line. A bypass circuit is coupled between the transmission and subscriber lines for allowing the test signals to bypass the communication system. Also, a discriminator is coupled to the subscriber line for discriminating a connection status of the communication set.

Abstract: A transmission power control method in a mobile communication system using a code division multiple access (CDMA) method includes: a power control process in an access mode having: a step of measuring a transmission power of an initial access channel transmitted from a terminal; a step of comparing the measured transmission power level with a pre-setted adequate power level; a step of transmitting a transmission power adjusting message to the terminal according to the comparison result; and a step of the terminal adjusting the transmitting power of the traffic channel to the adequate power level according to the transmission power adjusting message transmitted from a base station; and a power control process in a traffic mode having: a step of measuring the transmission power level of the traffic channel transmitted from the terminal; a step of comparing the measured transmission power level with the pre-setted adequate power level; a step of transmitting an one-bit power control bit to the terminal according

Abstract: An automated system and method for call handling includes a signal generator such as an Intelligent Services Peripheral (ISP) for generating a call handling request signal representing selected parameters of a call. The signal is directed for receipt by an Integrated Service Control Point (ISCP) or other suitable AIN component which is provided in communication with or includes storage means for storing (a) a unique Service Number for each of a plurality of subscriber calling numbers, and (b) a corresponding Service Profile (call forwarding profile). Each call forwarding profile comprises a plurality of Destination Numbers each assigned a calling day, a calling time and a calling priority designation. The call handling request signal is processed at the ISCP to generate (a) a list of Destination Numbers to route the call to, and (b) a corresponding routing order for the day and time the call is placed.

Abstract: A method and apparatus for testing network elements within a communications system. A test is initiated at a data processing system located at a first site by the selection of one or more network elements for testing. In initiating the test, a communications link is established between the data processing system located at the first site and a network element located at a second site. The network element is monitored during testing of the network element using the communications link. The information is displayed on the data processing system in the form of a web page. Monitoring of the network element is paused from the data processing system in response to detecting an error originating from the network element. Monitoring of the network element is restarted from the data processing system in response to a correction of the error.

Abstract: A communication system includes mobile units, a network switching center, and service centers to provide a variety of services to mobile units. Using a voice network and a data network, the network switching center establishes a voice/data session between a mobile unit and an appropriate service center. The network switching center maintains a profile table that designates the service center and provides access parameters to establish the voice/data session.

Abstract: A common mode bias voltage generator apparatus and method includes a plurality of MOSFET-based transistors and a plurality of resistors configured and arranged to provide a half of a supply voltage with a predetermined low output impedance while using relatively little power and circuit area.

Abstract: A transmitter which includes a quadrature phase shift keying (QPSK) modulator, and a receiver which includes a pilot correlation filter (PCF), a data matching filter (DMF), a timing recovery mechanism, a sampler, and a QPSK demodulator are provided in a wireless communication system. The transmitter transmits a frame of data symbols and pilot symbols to a receiver in a wireless system. The pilot symbols are inserted in the frame at known time intervals. The QPSK modulator modulates the frame of data and pilot symbols. As the receiver receives the frame of data and pilot symbols from the transmitter, the PCF recovers the pilot symbols sent by the transmitter, whereas the timing recovery mechanism tracks the timing of the pilot symbols in the frame. The DMF enhances the multipath response of the frame of data and pilot symbols at the known time intervals of the pilot symbols, and outputs a plurality of enhanced peaks.

Abstract: A high potential/high efficiency amplifier contains at least two separate amplifiers. One amplifier is used for the typical inputs that are received from an input source and a second amplifier is used solely for peak inputs. Utilizing the second amplifier to handle the peak inputs allows the first amplifier to concentrate solely on the typical inputs. A small resistor tied to the output of the second amplifier reduces the output of the second amplifier. Thus, when the output of the first and second amplifiers are equal, the output of the first amplifier will be applied to the load. When the input exceeds the operational value for the first amplifier, the first amplifier logically disconnects itself from the load and the output of the second amplifier is applied to the load. Once the input returns to a value within the limits of the first amplifier, the first amplifier becomes operational again, and the resistor again becomes a barrier to the second output being applied to the load.

Abstract: A method, system, and system components to control and manage a cell-based network including cell-based switches connected by communications links for transporting cells of data between the switches. A management and control request directed to one of the switches in the network is diverted to a network manager. The network manager processes the request according to management and control procedures at the network manager to identify generic commands to transmit to one or more switches in the network. The generic commands are interpreted at each of the one or more switches to produce a respective instruction to direct operation of each of the one or more switches.

Abstract: In an electronic kaleidoscopic apparatus, a kaleidoscopic image forming unit extracts an initial image fragment of a specified region on the basis of image information picked up by a video camera. In response to the shape of the initial image fragment, the kaleidoscopic image forming unit regards the initial image fragment as an original image and repeatedly inverts/duplicates an image signal in this shape for every obtained reflection pattern, thereby forming a kaleidoscopic image and outputting the same to a display unit.