Abstract: A method and apparatus for operating on intelligent network calls in a telephone exchange with multiple access subsystems and an interconnection subsystem is provided. A list of intelligent network criteria is stored in each access subsystem. When an incoming call is received the access subsystem determines whether the incoming call matches one of the intelligent network criteria stored in the access subsystem. If a match occurs the access subsystem performs an intelligent network function. Intelligent network function may include filtering the call. If filtering is to occur a filtering method associated with the matched active filtering criteria is applied to determine whether a call should be blocked as a function of the filtering method.

Abstract: A communication node, for use in an inter-processor communication system in an asynchronous transfer mode switching system, provides two independent paths to upper layer switching modules for two duplicated processors, respectively, wherein the path from the processor to the upper layer switching modules includes the communication node, a node switching device, all devices are duplicated and operate by using an active and stand-by scheme, data transmitted is transmitted in the unit of a data packet and the data packet includes an information field, a node address field and a payload type field for representing whether data is switching inforamtion or not. The node comprises two subnodes controlled by the controller for the active and the stand-by processors, respectively. Each subnode has two buffers for storing received data and sending data.

Abstract: The present invention relates to a smart battery charging system, a charging method therefor and a power supply system for portable computer using the same that executes various charging operations securely corresponding to types of the smart batteries connected to the notebook computer. A smart battery charger 60 supplies charging voltage and charging current to the smart battery 70 selectively by controlling data input through an SM bus. The smart battery charger 60 and the smart battery 70 are connected to a keyboard controller 80 through the SM bus. The keyboard controller 80 determines the power on-off status of the notebook computer, based on second power voltage outputted from an SMPS 130, and identifies the types of the smart batteries, based on battery identifying signals outputted from the smart battery charger 60.

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: 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: An apparatus for processing an order-wire signal capable of providing a high quality communication between operators through an order-wire channel for use in a synchronous add drop multiplexer(ADM) including a multiplexing unit and a de-multiplexing unit comprises: mixer for mixing two signals to generate a mixed signal, one being a voice signal of an operator at the ADM, the other being an order-wire signal received from a de-multiplexing unit in the ADM; detector for detecting a slip to generate a control signal and generating slip data; and selector for selecting one out of the mixed signal and the received order-wire signal to produce a selected signal, and transmitting the selected signal to the multiplexing unit in the ADM.

Abstract: An IPC (Inter-Processor Communications) message router for use in routing an IPC message to a node comprises: a memory for storing receive enable signals at addresses therein, each of the addresses being identical to a routing address included in the IPC message, and outputting receive enable signals stored in the addresses corresponding to the routing address; and a converter and sync signal generator for extracting a routing address from a serial IPC message received, converting the serial routing address into a parallel routing address, sending the parallel routing address to the memory, and generating a sync signal, the sync signal being used in selecting a set of receive enable signals.

Abstract: A flash type analog-to-digital converter which generates a digital output signal in response to an analog input signal includes: a first comparator having a reference value being half of a level determining range against the input signal and determining whether the input signal is above or below the reference value; a first encoder for generating the most significant bits of the digital output signal from an output signal of the first comparator; a subtractor for producing a difference between the reference value and the input signal when the input signal is determined to be above the reference value by the first comparator; at least two second comparator for determining an output signal level of the subtractor; and a second encoder for generating the rest of the digital output signal other than the most significant bits from an output of the second comparators.

Abstract: An apparatus for monitoring a reference clock signal having a clock pulse train comprises a detecting block for counting pluses of a count clock signal to produce a count value and generate a count failure signal when the count value reaches a predetermined value, wherein the frequency of the count clock signal is larger than that of the reference clock signal; and a controlling block for generating a clear signal at every clock pulse of the reference clock signal to cleat the detecting block when the clear signal is inputted thereto.

Abstract: A call hold handling method for use in an electronic switching system employed in a CDMA communications system comprises the steps of: a) receiving hook flash and numeric digits of the third party from the first party; b) sending hold tone to the second party; c) performing a number translation of the numeric digits; d) checking subscription type of the third party; e) occupying a trunk line and going to step h) if the checking at step d) results in a conventional telephone subscriber; f) requesting and receiving a call processing information from the call hold handler if the checking at step d) results in a wireless subscriber; g) paging the third party if the checking at step d) results in a wireless subscriber; h) connecting the first party and the third party; and i) sending ring-back tone to the third party.

Abstract: A MAP provider system for processing SS7 (signalling system No.7) MAP (mobile application part) protocol between MAP user and TCAP (transaction capabilities application part) is provided.

Abstract: A digital cordless telephone (CT-2) system, having a multiple number of subscriber cordless handsets (HS's) and a subscriber manager which performs authentication for the HS's, comprises a plurality of base stations (BS's), each of the BS's being coupled with one or more HS's by radio channels for controlling radio link; and a system connector coupled with each of the BS's, coupled with a public switched telephone network (PSTN) for switching and concentrating channels between each of the BS's and the PSTN, and coupled with a public switched data network (PSDN) for communicating with the subscriber manager.

Abstract: A method, in an electronic switching system comprising a main processor and line processors which can adapt K number of signaling types, N and K being positive integers, respectively, wherein the system is connected to another electronic switching system at trunk ports through trunk lines and the main processor includes a database for the line processors, route data, prefix data and state of the trunks including the trunk lines and the trunk ports, comprises the steps of: identifying a signaling type of a line processor; informing the identified signaling type to an operator; checking whether the trunk port connected to the line processor adapts the identified signaling type or not if the operator decides to change the identified signaling type; deleting data of the trunk in the main processor's database and assigning a new signaling type to the line processor if said trunk port adapts the identified signaling type, wherein the new signaling type is a same signaling type as used in said another electronic swi

Abstract: An apparatus for interfacing a data processing system with a plurality of data communications networks comprises: M number of interfacing units, each for coordinating data exchange between the data processing system and the plurality of data communications networks, wherein each of the M number of interfacing units are identical to each other and operate alternately in an active and a stand-by modes so that one in the M number of interfacing units is in active mode while the others are in stand-by mode and M is a positive integer larger than one; and buses for exchanging data among the M number of interfacing units.

Abstract: A method, for use in a mobile communications system having a plurality of mobile stations (MS's) and a mobile subscriber information register (MSIR), provides a requesting MS with location information (LI) of a target MS. At a first step, a LI request signal, including a subscriber number assigned to the target MS, a service code representing a LI supplying service and a secret number, is received from the requesting MS. At a second step, it is checked whether the service code of the LI supplying service is included in the subscriber information of the target MS stored in the MSIR. At a third step, if the service code of the LI supplying service is included in the subscriber information of the target MS, it is checked whether the secret numbers included in the subscriber information of the target MS and the LI request signal are identical each other.

Abstract: An apparatus for use in a synchronous transmission system, for detecting a failure of a clock signal, which comprises: a reference clock generator for generating a reference clock signal (RCS) in response to a reset signal issued by a system controller in the STS; and means for receiving a clock signal, the RCS issued by the reference clock signal generating means and the reset signal and for producing a failure signal for the received clock signal, wherein the failure represents a state of a clock in which the clock does not have a pulse for a predetermined time interval, the time interval being measured by using the RCS.

Abstract: A method of initializing node addresses for use in an electronic switching system comprises the steps of: (a) storing all possible sets of node addresses, each set corresponding to an inter-processor communications configuration, and pointers in a residue of a memory; (b) receiving information on a designated set of node addresses which corresponds to a selected inter-processor communications configuration to be used; (c) locating a pointer corresponding to the designated set of node addresses; and (d) writing each address in the designated set of node addresses onto each corresponding register.