Abstract: A method and apparatus for enabling a service provider to map a subscriber service address to a specific Public Safety Answering Point (PSAP) and then provides an association between the subscriber's out of area phone number and the correct PSAP are disclosed. When the subscriber places an emergency call, such as an E911 call, the network performs a database lookup obtaining the corresponding PSAP associated with the subscriber's service address and routes the call to that PSAP accordingly.

Abstract: A communication system between head-ends and end-users is provided which expands bandwidth and reliability. A concentrator receives communication signals from a head-end and forwards the received communication signals to one or more fiber nodes and/or one or more mini-fiber nodes. The concentrator demultiplexes/splits received signals for the mini-fiber nodes and the fiber nodes and forwards demultiplexed/split signals respectively. The mini-fiber nodes may combine signals received from the head-end with loop-back signals used for local medium access control prior to forwarding the signals to the end-users. Upstream data are received by the mini-fiber nodes and/or fiber node and transmitted to the concentrator. The concentrator multiplexes/couples the mini-fiber node and the fiber node upstream signals and forwards multiplexed/coupled signals to the head-end.

Abstract: Method and apparatus for managing call requests in a communication network is described. In one example, a call request for a public identifier associated with a recipient party is received from an originating device. A set of approved calling party identifiers associated with the public identifier is identified. A calling party identifier associated with the originating device is compared with the set of approved calling party identifiers. If the calling party is approved, then: a private identifier for a recipient device is selected based on the calling party identifier, and the call request is routed to the recipient device using the private identifier. If the calling party is not approved, then: a call handling treatment associated with the public identifier may be identified, and the call request may be handled in accordance with the calling handling treatment.

Abstract: A method and apparatus for providing subscribers of a VoIP service provider to take advantage of wholesale arrangements made by the VoIP service provider with one or more international partner carrier network providers to one or more international countries are disclosed. Specifically, the present method enables a VoIP service provider to display a web page to their subscribers, for each destination country, with one or more international partner network providers and their corresponding calling rates and/or call completion success rates to each particular destination country.

Abstract: A method includes identifying shared content by inspecting a peer-to-peer traffic flow and identifying source peers providing the shared content, and requesting the shared content from the source peers. The method further includes receiving requests for the shared content from requesting peers, identifying requesting peers based on the requests for the shared content, and providing the shared content to a local subset of the requesting peers.

Abstract: A microprocessor is arranged to process instructions at least some of which contain at least one immediate value which forms an operand of the function, wherein said immediate value is represented in a format which achieves a greater power efficiency than two's complement when said instructions are processed.

Abstract: The present invention provides a method of determining a mean differential group delay associated with a length of optical fiber. The method including measuring a magnitude of a polarization mode dispersion vector as a function of frequency, using a frequency-domain polarization mode dispersion measurement apparatus, where the magnitude of the polarization mode dispersion vector is a scalar differential group delay. Also the method calculates a frequency derivative of the scalar differential group delay from the magnitude of the polarization mode dispersion vector to obtain a first result. The frequency derivative of the scalar differential group delay being a scalar second-order polarization mode dispersion function. The method further multiplies a proportionality coefficient B2 by the first result to calculate the mean differential group delay. Also, the method outputs a value of the mean differential group delay.

Abstract: Service and network management events are correlated, enabling a user to correlate all the application and network events that stem from a common fault without requiring repeated and exhaustive capturing of detailed knowledge of the network assets, the topological relationships and all possible events.

Abstract: Described is a system and method for receiving traffic load information for a plurality of access points, each of the access points including at least two channels for communicating and neighboring at least one of the other access points. A throughput of each channel of each access point is determined based on the traffic load information for each access point and any neighboring access points. A channel with a maximum determined throughput is selected for each access point. Each access point then switches to the selected channel at a defined probability rate.

Abstract: A content delivery system includes an upload module, a content delivery module, and a quality assurance module. The upload module is configured to receive content from a content provider, and generate an upload signature for the content as received from the content provider. The content delivery module is configured to receive a request for the content from a client system, and provide the content to the client system. The quality assurance module is configured to generate a download signature for the content as delivered to the client, and compare the upload signature and the download signature. When the upload signature and the download signature do not match, the quality assurance module is further configured to generate an alert.

Abstract: Unicast endpoint clients on an IP Unicast network are provided access to Multicast sessions on an IP Multicast network through a Multicast-Unicast gateway server. The server obtains information about sessions on the Multicast network and makes such information available to a Unicast client on the Unicast network upon request by the client. Upon being presented with a list describing the subject matter of each session, the user at the Unicast client selects the session to which he or she wants to join, which causes the Multicast-Unicast server to join the appropriate session on behalf of the requesting client. All packets then received by the server from the Unicast client are address-translated to the appropriate Multicast session address and vice versa. The Unicast client is then able to participate in the Multicast session as both a sender and receiver of packets to and from other Unicast and Multicast clients which are active.

Abstract: A method includes obtaining first information indicative of instability of a data communication network. The method also includes isolating a first portion of a network from a second portion of the network responsive to the obtained first information. After a predetermined period of time, second information indicative of instability of the first portion is obtained. The method further includes isolating a first segment of the first portion from a second segment of the first portion responsive to the obtained second information.

Abstract: A method and apparatus for providing email notification for called and/or calling parties of a call placement are disclosed. The method enables a packet network service provider, e.g., a VoIP or SoIP service provider, to register customers for email notification service, to obtain the disposition of calls from Call Detail Records (CDRs), call control elements or application servers that have access to call signaling information in real time, to identify calls that resulted in ringing without an answer or busy disposition, and to determine whether or not the called and/or calling party subscribed to the email notification service. If the calling and/or called party subscribe to the notification service, the service provider sends an email notification to the calling and/or called party containing the caller and called party information, the time of the call, the disposition of the call and the like.

Abstract: A system includes a gateway operative to couple the system to a user. The system further includes a first infolet coupled to the gateway, and operative to couple the system to a first virtual world application, a second infolet coupled to the gateway and to the first infolet, and operative to couple the system to a real world application. The system is operable to obtain first information requested by the user from the second infolet and send the first information to the virtual world application through the first infolet.

Abstract: A method includes receiving network distance information, receiving a request from a client for an identity of a peer providing content, and identifying a first peer and a second peer providing the content. The network distance information includes a compilation of network distance information provided by a plurality of service providers. The method further includes determining that a network distance between the first peer and the client is less than a network distance between the second peer and the client based on the network distance information, and providing the identity of the first peer to the client.

Abstract: A method of delivering content to a client includes receiving a request for the content from the client at a first server, determining the size of the content, and determining an optimal server to provide the content. The method further includes redirecting the client to the optimal server when the size of the content is above a threshold.

Abstract: The present invention provides a system and method for providing global traffic optimization for a mix of applications running at multiple locations connected by a WAN. Various techniques are provided via WAN accelerator, edge shapers, and WAN bandwidth, route, QoS, and packet control to maximize application performance while minimizing cost, in accordance with customer policy.

Abstract: A method includes receiving a request for an edge cache address, and comparing a requester address to an anycast group. The method can further include providing an anycast edge cache address when the requestor address is in the anycast group. Alternatively, the method can further include determining an optimal cache server, and providing a unicast address of the optimal cache server when the requester address is not in the anycast group.

Abstract: A system and method for filtering unwanted Internet Protocol traffic based on blacklists receives a first blacklist containing a first plurality of Internet protocol addresses associated with unwanted Internet traffic. The system also operates a first plurality of access control lists adapted to block the unwanted Internet traffic from one of the first Internet protocol addresses listed in the first blacklist. The system also assigns a first weight to each of the first Internet protocol addresses based on a reliability of Internet traffic from each of the first Internet protocol addresses. Additionally, the system reduces a first number of the first access control lists to optimally trade off a number of desirable Internet protocol addresses blocked with a number of bad Internet protocol addresses blocked based on the first weight of each of the first Internet protocol addresses.

Abstract: A method includes receiving a request for content from a client, and determining an elapsed time since a previous request for the content. Additionally, the method includes retrieving the content from a content server and storing the content in a cache when the elapsed time since the previous request for the content is not greater than a threshold. Further, the method includes providing the content to the client. The method also includes determining a cache-hit ratio and altering a threshold in response to the cache-hit ratio.