Abstract: A telephone switching network having a plurality of nodes interconnected through the network through channels having dynamically changeable capacity. The telephone switching network includes a plurality of switching nodes and a network manager responsive to each one of the nodes for allocating traffic capacity of the network among the nodes dynamically in accordance with the traffic requested at the plurality of nodes. Each one of the nodes is coupled to the network through an ATM ADM. Each one of the ATM ADMs is coupled to a narrowband switch through an ATM switch. The nodes are interconnected through an ATM SONET.

Abstract: Polarization Mode Dispersion (PMD) causes an optical pulse to be split into two arbitrarily oriented orthogonally polarized PMD pulses with a differential group delay therebetween in an optical transmission line. To compensate for the PMD induced distortion, a polarization controller in a PMD compensator selectively adjusts the aligning of the received arbitrarily oriented first and second principal states of polarization of the PMD pulses to match fixed orientations of predetermined first and second principal states of polarization of a beam splitter. First and second output paths of the beam splitter are coupled to first and second paths of a Mach-Zender interferometer arrangement. The Mach-Zender interferometer arrangement measures the PMD differential delay between the first and second principal states of polarization of the respective first and second PMD optical pulses, and selectively compensates for the measured differential delay.

Abstract: A telecommunication system for enabling a subscriber to calling features available by a central office to have access to such calling features when such subscriber is accessing the central office through either a line connected to the central office or an Internet, Intranet, Extranet (i.e., IP) network which uses the TCP/IP network protocol. The method includes the steps of: processing signals received by the central office from the subscriber through either the IP network or the line connected to the central office to determine whether the subscriber is placing a call to the central office through either the line to the central or through the IP network; and making such calling features available to the subscriber independent of whether the subscriber is connected to the central office through the line to the central office or through the IP network.

Abstract: A distributed database management (DDBMS) system for switching applications that combines rapid feature deployment with high real-time performance. The system architecture encompasses a new software boundary between application and database, yet provides the benefits of open standard interfaces and distributed transaction control. To accomplish this dichotomy, an object-oriented schema is used to arrange the DDBMS as an intelligent service provider, separating services from physical location and implementation. A software containment approach is utilized to optimize interfaces based on grouping of data so as to permit application-specific routines to be "plugged-into" the database. The DDBMS is arranged to address extendibility and real-time performance needs of capabilities such as ISDN and IN is switching offices and network nodes.

Abstract: A method for enabling a plurality of Local Service Providers within a common Numbering Plan Area (NPA) to serve Subscribers of the plurality of Local Service Providers. The method includes the step of assigning to each Subscriber of a Local Service Provider within the common NPA a unique three digit code, hereinafter referred to as a SPA code. The service provider area (SPA) code is used by the telephone system in the same manner presently used for routing calls made when a calling Subscriber dials the NPA code of the called party. Here, however, the SPA code is not dialed by the calling Subscriber. The dialed directory number, NXX-XXXX, of a called Subscriber subscribed to a different Local Service Provider, is sent to a database. The database maintains a record of the relationships between the directory numbers of Subscribers and the SPA codes of the Subscribers. The database retrieves the SPA code associated with the dialed directory number presently serving the called Subscriber.

Abstract: A loopback enabled by an instruction and address code pair transmitted with the regular data stream affords a simplified fault location scheme for a T1 repeater span. By selecting unique addresses for each repeater using a predetermined frame sequence and by testing for logic error density, erroneous enablement is avoided.