Abstract: A system, and methods for detecting collisions on multipoint shared optical media, comprising an optical receiver, clock phase detector, clock recovery circuit, and a Passive Optical Network (PON) that transmits optical signals wherein the PON, the clock recovery circuit, and the clock phase detector are communicably coupled to the optical receiver, detecting of the collision is determined by a distortion of transition times of the optical signals at the optical receiver.

Abstract: A system, method, and computer readable medium for strict priority weighted round robin scheduling includes selecting a set of bandwidth allocation table filled entries having a common destination address, each filled entry associated with a received data packet and determining a scheduling weight for each bandwidth allocation table entry in the selected set, the scheduling weight determined first by a priority and then by an assigned weight.

Abstract: A system, method and computer readable medium for service creation via presence messaging comprising assigning an information exchange state associated with a presence message and directing the presence message to at least one of a service provider from a predetermined set of service providers.

Abstract: A system, method and computer readable medium operable to move a video delay from a network video queue to a decoder video queue by discarding at least one video frame in a network video queue, thus moving video frames deeper in the queue forward in time. As such, rapid channel changing is provided without continuous unicasting, or temporarily transmitting at faster than the nominal rate, thereby alleviating strain on the network.

Abstract: In a frame synchronous scrambled communications network, communications are protected from pathological bit patterns that may lead to loss of receiver lock by detecting a pathological bit pattern in an incoming traffic stream using a pathological pattern detector. When a pathological bit pattern, such as a transition-less bit pattern, is detected, a corrective bit pattern is generated and inserted or substituted into the incoming traffic stream before transmission to the receiver. The receiver can be configured to revert the modified traffic stream back to the original traffic stream.

Abstract: A system and computer readable medium for a burst mode optical receiver that enables an optical receiver to receive signals from a plurality of optical network units at different optical power levels. In an exemplary embodiment, the system may include a memory that stores a received signal strength indication, and a media access controller communicably coupled to the memory. The media access controller receives a received signal strength indication of an upcoming data stream to an optical network unit, and asserts a signal control voltage during a guard time to an optical receiver to optimize reception of incoming data streams of the optical network unit based upon the received signal strength indication received from the upcoming data stream.

Abstract: A system, method, and computer readable medium for increasing an upstream optical coding gain in a passive optical network (PON). In an exemplary embodiment of the invention, the system may include a memory structured to store Optical Network Terminator (ONT) burst timing values, and provide a previous burst timing value of the burst timing values to a translator. Further, an upstream burst grant timing scheduler may provide a scheduled timing value to the translator, wherein the translator may be structured to translate the previous burst timing value to a new expected timing value per an ONT upstream burst in association with the scheduled timing value. Also, a delimiter match and search block may be structured to use the new expected timing value to check a bit stream for a delimiter pattern match. An alarm counter may be provided in the system that is structured to provide an alarm when the delimiter pattern match is not found.

Abstract: A system, method, and computer readable medium to provide alternative communications during jamming in a presence system, that comprises, registering a mobile device as a presentity to a presence server in the presence system, detecting a communication jamming of the mobile device, providing information related to the detected communication jamming as a state information to the presence server, and upon attempting to communicate with the mobile device while being jammed, providing the state information and offering an alternative communication suggestion.

Abstract: A system, method, and computer readable medium for time stamp offset in data packet bundling including filling a globally distributed time stamp based upon a globally distributed time, receiving a signal unit, resolving a difference in time between the globally distributed time stamp and the reception of the signal unit and assigning a time offset based upon the resolved time difference.

Abstract: A process for monitoring memory growth of a software application includes measuring a baseline memory usage for processes operating on a computer system. A background memory logging script is then executed to log process memory usage. At some later time, a trending script is executed which outputs a list showing how memory usage has changed for each process operating on the system.

Abstract: A system, method and computer readable medium comprising instructions for sending a message from an Optical Network Terminal (ONT) to an Optical Line Terminal (OLT), if the ONT does not receive an expected OLT action or an expected OLT response to the message within a period, considering the non-receipt of the expected OLT action or the expected OLT response a failure, and if a certain number of consecutive failures have occurred, considering by the ONT that it has entered an uncontrolled state.

Abstract: A distributed network management system that utilizes policy rules in rendering management decisions. The system includes a policy console that populates and manages network policies in a policy repository. Various network devices coupled to the policy repository download policy rules relevant to the devices for managing network elements associated with each network device. Each network device includes a policy decision module for rendering management decisions for its network elements based on the retrieved network policies. Each network device further includes a policy enforcement module for enforcing the management decisions and controlling the associated network elements based on the policies.

Abstract: A system, method, and computer readable medium for rogue Optical Network Unit (ONU) detection via photonic mixing, comprises a first Wavelength Division Multiplexer (WDM), a second WDM communicably coupled to the first WDM, a non-linear medium communicably coupled to the second WDM, and a photodetector communicably coupled to the non-linear medium, wherein the first WDM transmits a first upstream beam and a second upstream beam to the second WDM, wherein the first upstream beam is a normal upstream beam and wherein the second upstream beam is a rogue upstream beam, wherein the second WDM transmits the normal upstream beam and the rogue upstream beam to the non-linear medium, wherein the non-linear medium mixes the normal upstream beam and the rogue upstream beam resulting in a mixed beam, wherein the non-linear medium transmits the mixed beam to the photodetector, and wherein the photodetector analyzes the mixed beam to indicate the presence of a rogue ONU.

Abstract: A stack switch for performing pass-through forwarding operations, assigning stack switch identifiers to a plurality of stack switches, temporarily disabling supervision messages exchanged by stack switches, and electing a primary master stack switch is disclosed. In the pass-through mode, the stack switch automatically forwards packets between stack ports independent of their destination address to maintain connectivity between adjacent stack switches while conventional bridging and routing operations are disabled. The sequential identifiers are also preferably assigned in accordance with the sequential position of the various stack switches to better reflect the topology of those switches. The switch is also preferably adapted to temporarily disable the transmission of supervision messages between stack switches to prevent re-assignment of network management functions when switch resources are low.

Abstract: A method, apparatus, and system for managing network devices is disclosed. The method preferably includes the steps of monitoring for a change to the value of one or more local resource properties associated with the managed network device; generating a learning event report comprising the value of at least one of the one or more local resource properties; and transmitting the learning event report to a central data store. At the central data store, the value of the one or more local resource properties are recorded and made available to the network management system for asynchronous processing. The central data store is preferably a directory server.

Abstract: In a dual rate gigabit passive optical network, an optical line termination (OLT) transmits a first rate (GPON) message frame interleaved with a second rate (NGPON) message frame. An unused ATM partition of the GPON message frame is provided with a header and payload portion of the NGPON message frame so that the message frame remains at a predetermined length required by the network.

Abstract: A network environment including a provider network coupled to a first customer network site via a first access link and to a second customer network site via a second access link. The provider network is operable with the IEEE 802.1ag standard for propagating a remote link fault condition via an Ethernet Alarm Indication and Suppression (AIS) frame or a Continuity Check (CC) frame, which is translated into a locally compliant non-IEEE 802.1ag error delivery condition so that a management entity associated with the first customer network site is appropriately alerted.

Abstract: A method, a computer readable medium, and a system for discovering an Optical Network Terminal (ONT) in a Dense Wave Division Multiplex (DWDM) hybrid Passive Optical Network (PON) Line Terminal (LT), comprises implementing, by an Optical Line Termination (OLT), a ranging procedure on at least one downstream link, wherein the OLT is communicably coupled to the ONT, discovering at least one new ONT, by the OLT, on the at least one downstream link based on the ranging procedure, discovering an unranged ONT, by the OLT, during the ranging procedure, and determining, by the OLT, that the unranged ONT resides on the at least one downstream link.

Abstract: In a passive optical network, an upstream transmission rate from an ONT to an OLT can be optimized by matching a transmission scheme for a channel to the upstream transmission characteristics of the channel. An FEC coding can be made channel dependent so that channels with low error rates can use minimal protection, and therefore minimal overhead, while channels with high input bit error rates can use the level of FEC coding required to produce a desired output bit error rate.

Abstract: A method and system for augmenting routing decisions in a network switching device with topology information acquired using source learning are disclosed. In the preferred embodiment, the method of selecting a port to transmit an outbound flow from a first node to a second node comprises the steps of identifying a plurality of ports associated with minimal equal-cost paths from the first node to the second node, and if an inbound flow from the second node is detected on a first port of the plurality of ports of the first node, then transmitting the outbound flow from the first port. In the absence of an inbound flow from the second node, the first node generally selects the port for the outbound flow from the plurality of minimal equal-cost paths.