Abstract: A photodiode with a semiconductor intrinsic light absorption layer has at least one p-doped light absorption layer or an n-doped light absorption layer, and preferably both. The diode also has a cathode electrode and an anode electrode electrically coupled with the p-doped light absorption layer or the n-doped light absorption layer.

Abstract: A photodiode with a semiconductor intrinsic light absorption layer has at least one p-doped light absorption layer or an n-doped light absorption layer, and preferably both. The diode also has a cathode electrode and an anode electrode electrically coupled with the p-doped light absorption layer or the n-doped light absorption layer.

Abstract: An apparatus for controlling telephone communications through a communication switch during intervals of call traffic volume in excess of a threshold call traffic volume includes: (a) a call traffic volume sensing device coupled with the communication switch and measuring the call traffic volume during selected intervals; and (b) a call traffic control device coupled with at least one of the communication switch and the call traffic volume sensing device. The call traffic control device cooperates with the communication switch to involuntarily terminate selected calls through the communication switch when at least one selected parameter is exceeded. The at least one selected parameter includes the call traffic volume.

Abstract: This invention discloses the design of a semiconductor-based image intensifier chip and its constituent photodetector array device based on sidewall-passivated mesa heterojunction phototransistors (HPTs).

Abstract: Call data associated with one call is correlated from separate call records associated with the calling and called parties in which at least one of the parties is a wireless user. Statistical information is gathered based on whether one of the parties to the call subscribes to one call feature/service and the other party to the call subscribes to a predetermined call feature/service. This information is typically utilized by telecommunication service providers.

Abstract: A method and apparatus for alerting a plurality of groups of telephone stations in sequence in response to receipt of a pilot directory number in a first telephone switching system first switch alerting a group of telephones; if none of the first group of telephones answers establishing a connection via a second pilot directory number to a second switch for accessing a second group of telephones and alerting the members of the second group. Advantageously, this arrangement allows a telephone call to be completed to a first preferred group of telephones before attempting to complete the call to a second group of telephones.

Abstract: A photodiode with a semiconductor intrinsic light absorption layer has at least one p-doped light absorption layer or an n-doped light absorption layer, and preferably both. The diode also has a cathode electrode and an anode electrode electrically coupled with the p-doped light absorption layer or the n-doped light absorption layer.

Abstract: Call data associated with one call is correlated from separate call records associated with the calling and called parties in which at least one of the parties is a wireless user. Statistical information is gathered based on whether one of the parties to the call subscribes to one call feature/service and the other party to the call subscribes to a predetermined call feature/service. This information is typically utilized by telecommunication service providers.

Abstract: A method and apparatus for determining the base station and sector serving a target mobile station. A client makes a request to locate a target mobile station. A server connected to the client determines whether the client is authorized to make this request. If so, the server sends a request to the mobile network to determine the base station and sector currently serving the target mobile station. The mobile network returns information identifying the country, carrier, vendor, and region of the switch serving the mobile station. The server then queries a centralized database to translate between the non-standard format data identifying the base station and sector and a geographic location of that base station and sector. Advantageously, the arrangement is much less expensive than arrangements which seek to determine an exact location of the mobile station.

Abstract: Separate file servers are located in different geographic areas to serve users in each area. A centralized system manager with communication links to the file servers and users controls documents stored in the file servers. The system manager must approve each request by a user to download a document from a local file server. If the requested document is not stored at the local file server, the system manager will cause the requested document to be transferred from another file server to the local file server for access by the user. Documents being accessed by users are locked thereby denying access to other users until the current access by another user of the sought document is terminated.

Abstract: A method and apparatus for establishing additional channels for a call between multi-task user terminals. A multi-task call (MTC) signaling module is used to receive requests for the addition or release of additional channels for a call. Through a signaling network, the module has access to the switches of a hybrid network for interconnecting edge switches connectable to MTC terminals. The MTC signaling module controls establishment or release of the connections between links of the paths through the hybrid network. Advantageously, an MTC terminal through its MTC signaling module can control the addition or release of channels through the hybrid network.

Abstract: In a packet switch for communicating packet switched data to and from a plurality of wireless mobile stations, a method and apparatus for automatically releasing resources tied up for communicating with dormant mobile stations. If the station has been dormant for a sufficiently long time, an alerting message is sent to the user of that mobile station. The user can then respond by requesting a release of the packet switched data (PSD) call currently connected to that mobile station or can request that the connection remain up. Advantageously, if the user of the station does not respond, then following a timeout the PSD call is released and the resources required for keeping the dormant call in existence are made available for new calls.

Abstract: This invention relates to methods and apparatus for measuring the performance of packet transmission in a cellular wireless telecommunications network to a user of such a network. Test packetized data is transmitted to the user and echoed back by the user. Differences between the transmitted and received echoed packets and delay in receiving the packets are analyzed. Packets are echoed at the user's station without alerting the user. The test packets have time stamps in order to allow delay between the transmission of the test packet and the reception of the echoed test packet to be measured. The transmitted and echoed packets are analyzed to determine error rates and delay in order to determine a quality of service for the data transmission.

Abstract: A method and apparatus for alerting a plurality of groups of telephone stations in sequence in response to receipt of a pilot directory number in a first telephone switching system first switch alerting a group of telephones; if none of the first group of telephones answers establishing a connection via a second pilot directory number to a second switch for accessing a second group of telephones and alerting the members of the second group. Advantageously, this arrangement allows a telephone call to be completed to a first preferred group of telephones before attempting to complete the call to a second group of telephones.

Abstract: An apparatus for controlling telephone communications through a communication switch during intervals of call traffic volume in excess of a threshold call traffic volume includes: (a) a call traffic volume sensing device coupled with the communication switch and measuring the call traffic volume during selected intervals; and (b) a call traffic control device coupled with at least one of the communication switch and the call traffic volume sensing device. The call traffic control device cooperates with the communication switch to involuntarily terminate selected calls through the communication switch when at least one selected parameter is exceeded. The at least one selected parameter includes the call traffic volume.

Abstract: The present invention provides a method to a wireless station in a wireless communication system. A Mobile Switching Center (MSC) receives a call request for the wireless station. If the MSC determines that the called wireless station is engaged in an existing data call, the MSC alerts the wireless station of the call request while the called station is involved in the existing data call. A user of the mobile station determines if they would like to accept, reject, or forward the call request. The response of the called mobile station is sent to the MSC, which processes the new call request in accordance with the response from the called mobile station. If the called mobile station accepts the call request, the existing data call is placed on hold while the new call is completed.

Abstract: Resources within a hybrid packet-circuit network are dynamically reallocated based on demand. In response to an edge switch requesting additional first resources, a network manager evaluates a plurality of possible communication paths and potential network changes to determine an optimum configuration for providing the additional first resources. Network switches are instructed by the network manager to reallocate second resources such as packet-switched resources to first resources such as circuit-switched resources.

Abstract: A photodiode with a semiconductor intrinsic light absorption layer has at least one p-doped light absorption layer or an n-doped light absorption layer, and preferably both. The diode also has a cathode electrode and an anode electrode electrically couple with the p-doped light absorption layer or the n-doped light absorption layer.

Abstract: A calling phone (110) initiates a call request to a roaming mobile unit (160). The call request is routed to the home MSC (140) of the called roaming mobile unit (160). The home MSC (140) routes the call request to the mobile unit (160), and upon answering by the called mobile unit (160), a first voice path is established between the calling phone (110) and the roaming mobile unit (160). The serving MSC (150) initiates backward signaling to the switch (120) to set up a second voice channel that does not traverse the home MSC (140). The voice signals from the call are then transferred to the second voice channel, and the links from the first voice channel are released.

Abstract: A new approach to congestion control includes features which overcome many of the limitations of the current congestion control approaches. The new approach uses a rate-based congestion control mechanism which uses a combination of multiple indicators of congestion. The transmission rate is decreased when there is an indication of congestion and the rate is increased when there is an indication of little or no congestion. The approach can also limit the transmission rate of multiple data streams destined to the same network node.