Abstract: A method for tracing communications includes receiving trace criteria from a first remote element and determining whether a call signaling message matches the trace criteria. The method includes attaching a trace tag to the call signaling message, if the call signaling message matches the trace criteria. The method further includes transmitting the call signaling message to a second remote element.

Abstract: A packet quarantine device receives a data packet over a secure connection having a connection-specific set of security parameters such as an IPsec connection in a virtual private network (VPN) using security associations. The packet quarantine device tests the data packet and if the data packet fails to validate, the packet quarantine device saves the data packet to a storage area along with the set of security parameters used to transmit the data packet. The stored information of the failed packet along with the set of security parameters enables later analysis of the failed packet in order to determine the network condition that produced the failed data packet. The packet quarantine device also generates alerts in response to receiving data packets that fail to validate. The alerts include information obtained from packet analysis.

Abstract: An electronic equipment assembly includes a shelf having a front section configured to support a front set of circuit boards and a rear section configured to support a rear set of circuit boards. The electronic equipment assembly further includes a midplane disposed within the shelf between the front section and the rear section. The midplane is configured to directly connect to the front set of circuit boards and to the rear set of circuit boards. The electronic equipment assembly further includes a fan subsystem disposed within the shelf. The fan subsystem is configured to generate an air stream through the front and rear sections with air flow of the air stream being faster through the front section past the front set of circuit boards relative to the rear section past the rear set of circuit boards.

Abstract: A circuit board has a first component interface configured to connect to a first circuit board component, a second component interface configured to connect to a second circuit board component, a differential signal pair electrically connecting the first component interface to the second component interface, and a signal return path configured to operate as a signal return pathway for the differential signal pair. The signal return path includes first conductive material which is in electrical communication with the first component interface, second conductive material which is in electrical communication with the second component interface, and a dielectric which provides direct current separation between the first and second conductive material. Such a circuit board may alleviate the need for DC blocking capacitors along the differential pair, and along other differential pairs when the circuit board has multiple differential pairs connecting the first and second component interfaces.

Abstract: A method and a system for collecting information in a network. A wiretap tunnel interface is initialized between a wire-tapping device and a network device. The wire-tapping device receives information related to routing protocol traffic from the network device through the wiretap tunnel interface. The wire-tapping device collates the received information about the routing protocol traffic. This collated information is used by the network administrator to manage the network.

Abstract: A modular Cable Modem Termination System (CMTS) includes a packet shelf operating a Data Over Cable Service Interface Specifications (DOCSIS) Media Access Control (MAC) framer. One or more downstream Physical Interface (PHY) shelves receive DOCSIS data from the packet shelf over a packet switched network and modulate the DOCSIS data for sending on a downstream path of a cable plant. One or more upstream PHY shelves send DOCSIS data received from an upstream path of the cable plant over the packet switched network to the packet shelf. By separating the PHY components from the MAC and from the system software, the PHY components for a Hybrid Fiber Coax (HFC) plant may be replaced with different PHY components for other access technologies such as wireless, Digital Subscriber Lines (DSL), Ethernet-to-the-Home, Fiber-to-the-Home, or fiber Passive Optical Networks (PONs).

Abstract: A system and method for selectively controlling traffic in a network to improve network performance. The system includes a network controller that includes a first control-traffic prioritizer. An Access Point (AP) includes a second control-traffic prioritizer and communicates with the network controller. One or more clients communicate with the AP. The communications behavior of the client is affected by operations of the first control-traffic prioritizer and the second control-traffic prioritizer.

Abstract: Methods, apparatuses, and systems directed to facilitating troubleshooting wireless connectivity issues in a wireless network. In accordance with one embodiment of the present invention, either a diagnostic supplicant in the wireless client or a diagnostic manager initiates a troubleshooting protocol between the diagnostic supplicant and the diagnostic manager over a diagnostic link in response to one or more events. In one embodiment, after the diagnostic supplicant establishes a link to a diagnostic manager via a diagnostic link, the diagnostic supplicant generates and transmits a problem report to the diagnostic manager. The problem report initiates a troubleshooting protocol between the diagnostic manager and the diagnostic supplicant.

Abstract: Methods and systems for network management data collection have been provided. Underutilized computers in the network are allocated as a Network Management Data Collection Client (NMDCC) to collect network management data. The NMDCC receives program files from the network management server. The received program files are downloaded by the NMDCC in a compressed manner via a web service. The downloaded program files are executed for collecting the Network Management Data (NMD). The collected NMD is updated back on the network management server. The downloaded program files are discarded when the NMDCC is not collecting the network management data.

Abstract: Methods, apparatuses, and systems directed to reliably providing emergency services to wireless clients. In one embodiment, a wireless client determines if an attempt to transmit an emergency message exists. If so, the wireless client determines if one or more wireless access points support expedited bandwidth capabilities. If so, the wireless client notifies one of the wireless access points that the wireless client has an expedited bandwidth request.

Abstract: Mechanisms and techniques operating in a content distribution network in a peering relationship with a second content distribution network. The system maintains a first client list identifying a first set of client devices associated with a first content distribution network. The system also obtains a second client list identifying a second set of client devices associated with a second content distribution network. The system applies a client list filtering technique to the first client list and the second client list to produce a preferred client list associated with the second content distribution network. The preferred client list potentially identifies at least one preferred client device for which the second content distribution network preferably processes client requests.

Abstract: A system transmits a plurality of media programs in a network. In one embodiment of the invention, a media program distribution system determines a first resource attribute of a first media program and a second resource attribute of a second media program. The distribution system compares the first resource attribute with the second resource attribute to determine a relative value. In turn, the media server assigns a first distribution resource to the first media program and a second distribution resource to the second media program in response to the relative value and applies one of a plurality of transmission modes to each media program in response to the resource attribute and distribution resource type. Examples of distribution resources include unicast, multicast and broadcast channels. Examples of transmission modes include various protocols such as error checking protocols and encoding mechanisms such as codecs.

Abstract: Disclosed are methods and apparatus for handling data sent from a first public network to a second or same public network via a private network. In general terms, network translation address mechanisms are provided within the edge routers of the private network. When a first processing node sends a request to an edge router to access another processing node which resides in a public network, the edge router forms a binding based on two addresses associated with the first processing node. A first private address is initially associated with the first processing node, and the first processing node uses this private address to communicate with the private network. A second public address is also allocated to the first processing node based on the first processing node's request to communicate with a public node. The first processing node uses the allocated second public address to communicate with the requested public node.

Abstract: A method for generating an accurate adaptive clock is disclosed. The method includes accessing data at a first clock rate, generating an adaptive clock that has an adaptive clock rate that is based on the arrival rate of said data, accessing data related to the first clock rate and the adaptive clock rate. The adaptive clock rate is adjusted based on a determined relationship between the first clock rate and the, adaptive clock rate.

Abstract: Methods and apparatus are disclosed for verifying the integrity of an index or result produced by a content-addressable or associated memory or other device. A pre-computed data protection field is stored, either as part of a returned index of a content-addressable memory or in a separate storage. In one implementation, a data protection operation is performed on all or part of the returned index and a comparison is made with a pre-computed data protection field. In one implementation, a copy of the masks employed by a ternary content-addressable memory and a set of pre-computed data protection fields are stored. A particular mask and pre-computed data protection field are selected based on the generated index. The original input value is then masked by the selected mask and provided to a data protection function. The result of this function is then compared to the selected pre-computed data protection field.

Abstract: An approach for managing addition or deletion of nodes in a multicast or broadcast group, which avoids introducing a single point of failure at a group controller, certificate authority, or key distribution center, is disclosed. A central group controller utilizes a binary tree structure to generate and distribute session keys for the establishment of a secure multicast group among multiple user nodes. The central group controller is replicated in a plurality of other group controllers, interconnected in a network having a secure communication channel and connected to a load balancer. The secure communication channel is established using a public key exchange protocol. The load balancer distributes incoming join/leave requests to a master group controller. The master group controller processes the join or leave, generates a new group session key, and distributes the new group session key to all other group controller replicas.

Abstract: A system for automatically selecting communication frequencies for wireless communication devices (e.g., base unit, access point, and controller) being added to an existing wireless network. The operating frequencies, evaluated signal strength, and loads are used in determining the most suitable operating frequency. This automatic selection process eliminates the problems inherent in manual frequency selection.

Abstract: A method for resolving primary section mismatch at a local node coupled to a remote node with two working sections is disclosed. A first working section is initially identified as the primary section and a second working section is initially identified as the secondary section. The primary section supports network traffic and the secondary section operates as a backup for the primary section. The method includes receiving a status indication change of the working section identified as the primary section at the local node and switching the primary section to the second working section at the local node. A timer is started upon switching the primary section to the second working section at the local node and the primary section is switched back to the first working section at the local node after the timer expires if the other node has not switched its primary section.

Abstract: A streamed database archival process with background synchronization. Archive logs are streamed asynchronously such that a plurality of files can be transferred simultaneously from a host operational database to a backup archive database. By streaming the logs, the backup database is kept up to date and backlogs can quickly be resolved. Furthermore, an automatic recovery process is run in the background. This process automatically detects files on the backup database which may have been accidentally deleted or corrupted. The process recopies those missing or corrupted files from the host database without any human intervention.