Abstract: A receiver for generating an video output from a stream of data packets includes circuitry for decoding the stream of packets into a video signal, circuitry for generating video frames from the video signal, circuitry for detecting whether a missing packet is associated with a video frame of a first type and circuitry for selectively requesting retransmission of a missing packet responsive to the detecting circuitry.

Abstract: In a wireless communication system which includes a synchronization signal generator which generates a synchronization sequence, an RF transmitter which transmits the synchronization signal, and one or more receiver that receives the signal, where the synchronization sequence employs M PN codes of the same length that are repeated in a pseudo-random fashion for N code periods. Each receiver incorporates M filters matched to the M PN codes whose outputs are post detection combined in a manner consistent with the pseudo-random code transmission sequence to provide signal detection and synchronization. In another aspect, the synchronization sequence employs M time-shifted versions of a PN code that are repeated in a pseudo-random fashion for N code periods and each receiver incorporates a filter matched to the unshifted PN code and whose output samples are post detection combined in a manner consistent with the pseudo-random code transmission sequence to provide signal detection and synchronization.

Abstract: Network data switching comprises receiving a cell, associating the cell with a destination port, selecting an egress link that has been soft configured to be associated with the destination port, and switching the cell to the selected egress link. A network switch comprises an ingress link configured to receive a cell and a switch circuit coupled to the ingress link, configured to associate the cell with a destination port, to select an egress link that has been soft configured to be associated with the destination port, and to switch the cell to the egress link.

Abstract: A technique for providing access to a switch fabric is disclosed. In some embodiments, the method comprises determining scheduling information specific to a link to the switch fabric and using the scheduling information to determine a queue to be serviced by the link. In some embodiments, the system comprises a buffer configured to store a plurality of queues, and a queue scheduler associated with the buffer and configured to determine scheduling information specific to a link to the switch fabric and use the scheduling information to select one of the plurality of queues as the next queue to be serviced by the link.

Abstract: An ejector assembly for securing a modular assembly in a chassis is disclosed. The ejector assembly comprises a cam rotatably mounted to the modular assembly such that the cam may be rotated about a first axis, the cam having a control member configured to extend into a recess in the chassis when the cam is rotated into a locked position and be retracted from the recess when the cam is rotated into a retracted position; and a lever rotatably mounted to the modular assembly such that the lever may be rotated about a second axis substantially parallel to the first axis, the lever being configured to cause the cam to be rotated about the first axis when a force is applied to the lever to rotate the lever about the second axis, whereby the cam may be rotated into either the locked position or the retracted position by operating the lever.

Abstract: An apparatus and method for analyzing data streams in a data transmission environment. In one embodiment, the method involves: capturing data from at least one data stream at two or more taps associated with a system under test (SUT); filtering the captured data to extract data packets belonging to one or more data types; analyzing extracted data packets of each data type using packet header and payload information of the extracted data packets; and outputting results obtained from analyzing the extracted data packets.

Abstract: An actuating device for a connector having a push-pull coupling mechanism is disclosed. The device comprises a release pull integrated with the connector and configured to operably engage the push-pull coupling mechanism, and a grip, coupled to the release pull and remote from the push-pull coupling mechanism, to which force may be applied to cause the release pull to actuate the push-pull coupling mechanism.

Abstract: A header value or label, referred to herein as a source station identification (SSID), is added to an encapsulated packet header, such as by adding the SSID as a label to the bottom of a stack of MPLS labels. The SSID comprises a unique identifier that identifies the PE that originated the packet. In some embodiments, the IP address of the originating PE may be used as the SSID for that PE. The PE receiving this packet can then associate the source Ethernet MAC address of received TLS traffic, e.g., with the originating PE. Given the SSID of the originating PE, the receiving PE is able to determine which LSP to use to send Ethernet traffic to the station with the learned MAC address.

Abstract: A distributed digital cross-connect system (10) is provided. The system includes two or more network interface islands (12) that connect to the telecommunications network. The system (10) also includes one or more distributed services nodes (18). Each distributed services node (18) connects to two or more of the network interface islands (12). The network interface islands (12) can transmit data to each other through the distributed services node (18). An administration system (14) is also connected to each distributed services node (18) and each network interface island (12). The administration system (14) transmits matrix configuration and telecommunications channel routing data to the network interface islands (12) and the distributed services nodes (18).

Abstract: A system and method for application location register routing at a signal transfer point (26) are provided. The signal transfer point (26) includes processor clusters (64, 66, 68) and databases (236, 238) for processing queries including global title translation, local number portability, and application location register routing. A query message is received by the signal transfer point (26), a first database residing in the signal transfer point (26) is accessed to determine the location of a second database (238) also residing in the signal transfer point for processing the query message. The second database (238) is then accessed to obtain the network address of a home location register or short message service center, which is then used to deliver the query message to the network node specified by the network address.

Abstract: A system and method for transporting IN/AIN signaling (e.g., SS7 signaling) over an IP-based network using Stream Control Transmission Protocol (SCTP), wherein a peer-to-peer protocol adaptation (PPA) structure is provided at a signaling node. The PPA structure includes an interworking functionality between an MTP3 layer and the SCTP messaging, and operates to provide a symmetrical MTP2 adaptation interface therebetween. The PPA interface functionality facilitates the implementation of network management capabilities included in the MTP3 layer such that the advantageous features of SS7 signaling are retained in the SCTP transport. The MTP2 adaptation interface functionality is processed locally with respect to the signaling node, rather than backhauling the associated signaling to an external node via an IP connection.

Abstract: A line card provides terminating resistors for a bus or traces on a backplane. The line card terminations are activated (connected to ground) by a crossbar switch that is set according to programming (software/firmware/flash memory stored instructions) maintained on the line card to set the state of the resistive terminations. The programming maintained on the line card may be downloaded to the card into nonvolatile storage. The decision to utilize a specific line card to terminate or leave the bus unterminated is made by a control unit that sends command messages to the line card. A polling device interrogates each line card and sets the physically last card on the bus as a terminating card. The command messages are in ADSL Provisioning Message format and transmitted to each line card via a CPU Cell Data Link (CCDL).

Abstract: The time slot interchange capabilities of modern digital loop carriers are utilized to provide direct connectivity from the calling modem's line to an internet access modem bank through the digital loop carrier, thereby bypassing the local central end office. A call which is to a telephone number of an internet access provider's modem is routed to a bypass initiator. If the bypass initiator detects that the call is from a number which is serviced by a digital loop carrier having a local central end office bypass capability, then the bypass initiator issues a bypass command. The digital loop carrier establishes the bypass connection, but does not break the signaling connection on the initial call which was routed from the digital loop carrier through the local central end office to the bypass initiator. Once the bypass connection has been established, the bypass initiator sends a disconnect signal through the signaling connection of the initial call.

Abstract: A wavelength agile optical transponder system and method for testing a fiber optic link formed of a single fiber. An optical source coupled to the optic link provides a signal at a first wavelength which is propagated towards a wavelength division multiplex (WDM) coupler disposed on the optic link. Upon receiving the optical signal by a receiver, an optical cross-connect arrangement is utilized for transmitting the optical signal after translating its wavelength into a second wavelength. By evaluating the optical signal in the optical loop-back thus effectuated, the path integrity of the optic link is determined without having to know the wavelength of the incident signal or direction of transmission.

Abstract: Disclosed are systems and methods for transferring data between servers and subscribers. A central office employs DSL circuit cards. Each DSL circuit card encodes a digital signal using a discreet multitone technology (DMT) scheme, and sends an encoded signal on a subscriber line. A disclosed architecture allows the functions of a faulty DSL circuit card to be assumed by another card, without substantial disruption of subscriber service. Further, the architecture allows the faulty DSL to be physically replaced, with minimal disruption of subscriber service. Another aspect of the architecture allows for the testing of subscriber lines.

Abstract: A distributed local services telecommunications switching system (10, 50) is comprised of loosely coupled components, including a digital loop carrier (14, 56), an intelligent peripheral (12, 54), and a general purpose computing platform (12, 52). The digital loop carrier (14, 56) provides subscriber line interfaces (120, 150), network trunk interfaces (122, 152), and a cross-connect matrix (124, 154). The intelligent peripheral (12, 54) is coupled to the digital loop carrier (14, 56) for performing call processing functions. The general purpose computing platform (12, 52) is coupled to the digital loop carrier (14, 56) and intelligent peripheral (12, 54) for controlling and managing call processing operations thereof. The general purpose computing platform (12, 52) may be integrated or co-located with the intelligent peripheral (12, 54).

Abstract: An apparatus and a method for cross connect matrices includes originating, center and terminating stages in both a main portion and a back-up portion that allows center stages to be switched without causing a framing error. The signal from the main portion is transmitted through both the back-up and main portions of the cross connect matrices such that a terminating line card receives a frame aligned signal from the main and back portions. The terminating line card then switches its output to be the signal produced by the back-up portion with no framing error. In the main portion, the center stage may be switched. After the center stage is switched, the terminating line card can switch again to output the signal from the main portion.

Abstract: A distributed telecommunications switching subsystem (100) receives and distributes data packets passed between a plurality of switching subsystems or channel banks (102, 104, 106) and a data packet switch (110). Each channel bank (102) has a stored list of addresses. When a channel bank (102) receives a data packet, it compares the address of the data packet to its stored list of addresses, and transmits the data packet to another channel bank (104) if the address of the data packet does not correspond to any of the addresses in its stored list of addresses. The data packet is passed on until it reaches a channel bank (106) with a matching address or else it is appropriately handled by a last channel bank (106) in the chain. If the address of data packet matches an address in its stored list of addresses, the channel bank (102) passes the data packet through a subscriber interface card (120) to a customer premises equipment unit (108) corresponding to the address of the data packet.

Abstract: Congestion control is provided in a first telecommunications element by receiving a congestion state for a second telecommunications element coupled to the first telecommunications element. An internal congestion state is set in the first telecommunications element for the second telecommunications element based on the congestion state. The internal congestion state for the second telecommunications element is maintained in the first telecommunications element independently of receiving a disparate congestion state for the second telecommunications element.

Abstract: A local multipoint distribution system having a head end coupled to a plurality of base stations with each base station constituting a cell. Each base station has a plurality of sector beam antennas, each sector beam antenna illuminating a predetermined sector of the cell with RF communication signals. A plurality of RF subscriber stations for each sector of a cell, with each subscriber station having a high gain antenna with a narrow beam width oriented toward the sector beam antenna oriented toward its assigned sector. Time division multiple access control is provided at each subscriber station operated such that each subscriber transmits at a time different from the other subscribers in its sector so that the subscribers in a given sector do not interfere with each others' transmissions, respectively. The power level transmitted by the subscribers are adjusted or controlled so that the subscriber signals arrive at the respective base stations at about the same power level.