Abstract: A method and apparatus for authentication in a passive optical network are disclosed. In the disclosure, a first terminal serial number of an ONU and a first logic registration code are transmitted from the ONU to an OLT; if the OLT determines that the first terminal serial number does not match a second terminal serial number stored on the OLT, the OLT judges whether the first logic registration code received from the ONU matches a second logic registration code stored on the OLT; the OLT stores the first terminal serial number received from the ONU on the OLT if the first logic registration code matches the second logic registration code.

Abstract: Particular embodiments use aggregation logic that reduces the noise in a daisy-chained optical return signal aggregation of multiple nodes. The aggregation logic determines when an input to a transmitter/receiver is not used and disables or turns off that input. Further, in the case of daisy-chaining, a service group aggregation signal (e.g., RF signals) from the customer premise equipment (CPEs) serviced by a respective node are presented to the channel “A” port of a digital return transmitter/receiver. However, internal to the transmitter/receiver, aggregation logic auto-senses what optical return signals have already been aggregated up to that point in the daisy chain and can then intelligently place the service group aggregation signal onto one of the digital return transmitter channels. In one embodiment, if there are two return channels, A and B, whichever of these channels has seen fewer aggregations up to this point, will receive the service group aggregation signal.

Abstract: A system includes a master and a slave coupled via a wire pair for transmitting differential data. The master and slave are each powered by a local DC power supply. In a normal mode, a DC voltage and differential data are supplied over the same wire pair. The differential data is processed by a PHY AC-coupled to the wire pair. To enter a low power sleep mode, such as due to a temporary non-use of the system, the master interrupts the DC voltage on the wire pair, which signals to the slave to enter the sleep mode. The system is woken up by reapplying the DC voltage to the wire pair to signal to the slave to wake up. Only the DC path, and not the data path, is used for signaling the sleep mode and awake mode, so the data path can be disabled to conserve power.

Abstract: The invention relates to a method for performing network functions for a subscriber-sided (CPE) network access unit (ONT) in a telecommunication's access network with a central unit (CO, OLT), a distribution network (AN), and a multiple of network-sided network termination units (DPD) with subscriber-sided network access units (ONT) connected or connectable thereto, in which network a bidirectional communication path (1) is present between the central unit (CO) and that network-sided network termination unit (DPD), to which the subscriber-sided network access unit (ONT) under consideration is connected, in which for performing network functions a further bidirectional communication path (2) between the subscriber-sided network access unit (ONT) under consideration and the corresponding network-sided network termination unit (DPD) is used in connection with the bidirectional communication path (1) between the central unit (CO, OLT) and that network-sided network termination unit (DPD), as well as to a telecomm

Abstract: With the introduction of orthogonal frequency division multiplexing (OFDM) technology to communication channels in a cable network, cable modems that receive data downstream over subcarriers of the OFDM channel are grouped into modulation tiers based on at least one metric. Modulation tiers are generated at a subcarrier group level such that network elements can use different profile tiers depending in the subcarrier group in use. A scheduler facilitates the scheduling of modulation tiers for network element destination groups across subcarrier groups, where the modulation tier for a network element may vary between subcarrier groups. The scheduler also facilitates scheduling multiple network element destination groups for transmission of a plurality of subcarrier groups for optimal transmission to the network elements.

Abstract: A Universal Serial Bus (USB) key may include an optical transceiver having a USB interface for engagement to an electronic device such as a laptop computer or other USB-configured device. The USB key may include a converter or buffering, isolation, modulation or amplification circuitry. The USB key sends and receives data signals which may be carried upon an optical transmission as generated by an LED light source which in turn is in communication with a host device such as a network processor. The USB key may also include operational amplifiers (op-amps) and transistor amplifiers.

Abstract: Presented herein are techniques for detection and avoidance of interference in a telecommunications network. In one example, a cable modem termination system (CMTS) is configured to receive upstream traffic from a plurality of cable modems. The CMTS detects collision characteristics resulting from substantially simultaneous transmissions from different combinations of the cable modems. Based on the detected collision characteristics, the CMTS designates/identifies collision groups for each of a plurality of the cable modems. After designation of the collision groups, the CMTS schedules upstream transmissions by the plurality of cable modems such that cable modems within the same collision group do not transmit within a same time frame and such that two or more cable modems that are not within the same collision group may transmit within a same time frame.

Abstract: A DPOE system and a service auto-configuration method and network based on that system are provided, wherein, the DPOE system includes an acquisition unit, an analyzing unit and a configuration unit; the service auto-configuration network includes a DPOE system, a back-office management system and an ONU; the service auto-configuration method based on that system includes: the DPOE system acquiring a configuration file from the back-office management system, wherein the configuration file includes configuration information of the ONU and configuration information of an OLT in the DPOE system; the DPOE system analyzing the configuration file and obtaining the configuration information of the ONU and the configuration information of the OLT; configuring the OLT locally and configuring the ONU via a management channel between the OLT and the ONU. Thus the service can be opened without performing further configuration to the OLT individually after the process of the ONU initialization is completed.

Abstract: A multicast optical switch uses a diffractive bulk optical element, which splits at least one input optical beam into sub-beams, which freely propagate in a medium towards an array of directors, such as MEMS switches, for directing the sub-beams to output ports. Freely propagating optical beams can cross each other without introducing mutual optical loss. The amount of crosstalk is limited by scattering in the optical medium, which can be made virtually non-existent. Therefore, the number of the crossover connections, and consequently the number of inputs and outputs of a multicast optical switch, can be increased substantially without a loss or a crosstalk penalty.

Abstract: The present invention provides a method, apparatus and system for transmitting and receiving a client signal. A client signal is mapped to a low-order ODU via a GFP scheme, wherein the low-order ODU is sized to M equal sized timeslots of a high-order OPUk, wherein the high-order OPUk is divided into N equal sized timeslots, wherein M is any one of a group from 1 to N; wherein if k=2, then N=8, if k=3, then N=32 and if k=4, then N=80. The low-order ODU with the client signal is mapped to M equal sized timeslots of the high-order OPUk via a GMP scheme; and an OTU with the high-order OPUk and overheads is formed, and then the OTU is transmitted.

Abstract: Electronic equipment and methods for permitting quick control of the operating state of a source equipment side from sink equipment. A television receiver (sink equipment) 100 and an amplifier (repeater equipment) 200 are interconnected over an HDMI cable 610, and the amplifier 200 and a DVD recorder (source equipment) 300 are interconnected over an HDMI cable 620. Each of the pieces of equipment includes, in addition to an HDMI receiving unit and an HDMI transmitting unit, a high-speed data line I/F included in a bidirectional communication unit that uses predetermined lines of the HDMI cable. The bidirectional communication unit is used to transmit channel selection information, a remote control code instructing recording, “theater mode” designating information, a remote control code, or the like from the television receiver 100 to the audio amplifier 200 or DVD recorder 300.

Abstract: An optical network system for controlling a passive optical network (PON) in which at least one symmetric optical subscriber terminal and at least one asymmetric optical subscriber terminal coexist is provided.

Abstract: An apparatus comprising a processor, wherein the processor is configured to determine a plurality of available wavelengths that are available to transmit data over an optical network comprising a plurality of downstream nodes, select a plurality of encoding wavelengths from the available wavelengths, wherein the encoding wavelengths are a subset of the available wavelengths, apply a plurality of relative power levels to the encoding wavelengths, and encode the data using the encoding wavelengths and the relative power levels, wherein the encoding wavelengths and the relative power levels dictate the switching behavior of the downstream nodes when the data is received by the downstream nodes.

Abstract: The disclosure provides a method for quickly updating ranging results of optical network units by an optical line terminal. The method comprises the following steps: an Optical Line Terminal (OLT) distributes an acquired ranging difference to all the Optical Network Units (ONUs); and the current ONU implements quick updating of the ranging result of the current ONU itself according to the acquired ranging difference. The disclosure also provides a system for quickly updating ranging results of ONUs by an OLT, wherein a distributing unit in the OLT is used for distributing an acquired ranging difference to all the ONUs; an updating unit in the ONU is used for implementing quick updating of ranging result of the current ONU itself according to the acquired ranging difference. the method and system of the disclosure can save the quantity of messages, enable quick switching in protection status, thus implementing protection switching efficiently.

Abstract: An integrated passive optical network system is disclosed. The system comprises an optical distribution network (ODN), a time-division multiplexing (TDM)-optical line terminal (OLT), a wavelength-division multiplexing (WDM)-optical line terminal (OLT), a plurality of time-division multiplexing (TDM)-optical network units (ONUs), and at least one wavelength-division multiplexing (WDM)-optical network unit (ONU) comprising a first filter. The TDM-OLT and the WDM-OLT respectively transmit a first optical signal carrying a first downstream signal and a second optical signal carrying a second downstream signal to the ONUs through the ODN, and wavelengths of the second optical signal and the first optical signal are different. The TDM-ONUs respectively retrieve the first downstream signal. The WDM-ONU uses the first filter to retrieve the second downstream signal.

Abstract: A link setup method for a wavelength-division-multiplexing passive optical network (WDM PON) system. The system includes a service providing device, a local node, and a plurality of subscriber devices. The link setup method includes assigning an initial wavelength for communication between the service providing device and a new subscriber device to be installed in the local node. The assigning of the initial wavelength may be performed as a part of process for activating the subscriber device, and this procedure may be performed between a physical layer of the service providing device and a physical layer of the new subscriber device.

Abstract: The specification described a multifunction CSP (MCSP), and a MCSP/ONT assembly that is adapted for mounting inside the customer premises. In the MCSP/ONT assembly the MCSP subunit and the ONT subunit are stacked and attached directly together. The MCSP/ONT assembly combines the functions of the standard CSP box and the ONT box, thus eliminating the need for the building cable. In addition the MCSP subunit is adapted to integrate more than one ONT in the MCSP/ONT assembly. The MCSP subunit comprises a back box, a splice tray, and a cover.

Abstract: In the present invention, wasted power consumption caused when a clock and data recovery unit in an optical network unit in a PON system is activated from a power-saving state is reduced and rapid, secure communication is performed. A clock and data recovery unit includes a phase-locked loop that can be set to normal mode or power-saving mode and that includes a voltage-controlled oscillator and recovers a clock signal and a data signal from input signals. The clock and data recovery unit includes a reference clock multiplier circuit that multiplies a reference clock signal and outputs the multiplied reference clock signal; and a frequency training loop that includes the same voltage-controlled oscillator and performs synchronous oscillation training by the voltage-controlled oscillator using the reference clock multiplier circuit before the phase-locked loop transitions from power-saving mode to normal mode.

Abstract: Embodiments of the present invention provide a method and an apparatus for transmitting and receiving a client signal in an optical transport network. In the transmission method, a received client signal is mapped into a variable-rate container OTU-N, wherein a rate of the OTU-N is N times as high as a preset reference rate; and then, the variable-rate container OTU-N is split into N optical sub-channel transport units OTUsubs by column, where a rate of each OTUsub equals to the reference rate; next, the N optical sub-channel transport units OTUsubs are modulated onto one or more optical carriers; at last, the one or more optical carriers is transmitted through a fiber.

Abstract: A headend communications device communicates via a network to downstream network elements, such as cable modems coupled behind optical network units, and allocates and grants timeslots for upstream transmissions from the network elements. The headend communications device has a scheduler for managing and controlling timeslot allocations in a manner avoiding interference such as optical beat interference or FM carrier collisions. The scheduler identifies two or more cable modems or like customer network elements served by the headend communications device that will cause at least a pre-determined intolerable level of interference when allocated overlapping timeslots for upstream transmissions and prevents these two or more cable modems or network elements from being allocated and granted overlapping timeslots.

Abstract: An optical network unit according to the present invention is provided as comprising a configuration that component units built therein are grouped for at least two sheets of substrate modules and arranged thereat. There are provided individual embodiments: (a) arranging an L2 layer and a part of the component unit of an L1 layer at a first substrate module, meanwhile, arranging the left part of the component unit of the L1 layer at a second substrate module; (b) arranging the component units of the L1 layer and of the L2 layer at the first substrate module and the second substrate module individually by grouping therefor; and (c) arranging the component units of the L2 layer and of the L1 layer at the first substrate module and the second substrate module respectively.

Abstract: An apparatus comprising a processor configured to obtain one or more plant conditions regarding at least one of a plurality of customer premises equipment (CPEs) remotely coupled to the apparatus via electrical lines, and divide the plurality of coupled CPEs into a number of profile groups based on the one or more plant conditions, wherein each profile group comprises at least one CPE and supports one or more modulation orders.

Abstract: A system for routing signals in a Distributed Antenna System includes a plurality of local Digital Access Units (DAUs) located at a Local location. Each of the plurality of local DAUs is coupled to each other and operable to route signals between the plurality of local DAUs. Each of the plurality of local DAUs includes one or more Base Transceiver Station (BTS) RF connections. Each of the plurality of BTS RF connections is operable to be coupled to one of one or more sectors of a BTS. The system also includes a plurality of remote DAUs located at a Remote location. The plurality of remote DAUs are coupled to each other and operable to transport signals between the plurality of remote DAUs.

Abstract: A method implemented by a middlebox comprising registering a customer premises equipment (CPE) in the middlebox, wherein the CPE is coupled to the middlebox via an electrical line, and facilitating registration of the CPE in a central office (CO) equipment coupled to the middlebox.

Abstract: An arrangement at a Remote Node, a Remote Node, a Central Office, a WDM-PON and a method in an arrangement at a Remote Node, and a method in a Central Office are provided for supervision of the WDM-PON. The arrangement comprises at least one filter connected to the feeder fiber links and adapted to separate a data signal and an original OTDR signal received on either of the feeder fiber links. Further, the arrangement comprises a first splitter adapted to receive, from the at least one filter, the original OTDR signal, to split the original OTDR signal into a plurality of OTDR sub-signals and to output, to an N*M AWG, the plurality of OTDR sub-signals. The at least one filter is further adapted to output the original OTDR signal to the first splitter and to output the data signal to the AWG, thereby enabling supervision of the WDM-PON.

Abstract: An Ethernet-based transmission system using a dying gasp according to the present invention includes an SMPS for supplying power to an Ethernet-based lower level system, detecting a state of a power fault, and outputting a dying gasp alarm signal. A CPU receives the dying gasp alarm signal, and generates and transmits an alarm packet. A PHY chip receives the alarm packet, and uplinks the alarm packet so that the alarm packet is transferred to a higher level stage. An L3 switch receives the alarm packet and determines whether a power fault has occurred in the lower level system. Accordingly, the present invention applies a dying gasp to an Ethernet-based or EPON-based transmission system and is then capable of generating and transmitting an alarm packet so that when a power fault occurs, a device in a higher level network can rapidly determine the occurrence of the power fault.

Abstract: A transmission device that is coupled to a mesh network includes a memory, and a processor coupled to the memory, configured to detect an another transmission device in the mesh network, which receives a first data signal that is same as a second data signal requested to the transmission device, and branch the first data signal to the transmission device from the detected another transmission device.

Abstract: Embodiments of the present invention provide a method and an apparatus for transmitting and receiving a client signal, and relate to the field of communications technologies. The method includes: mapping the client signal into channels of a parallel transmission frame, where the parallel transmission frame includes at least two channels; adding an overhead for the channels of the parallel transmission frame after the mapping, to form transmission channels of the parallel transmission frame, where bit rates of the transmission channels of the parallel transmission frame are fixed; and modulating the transmission channels of the parallel transmission frame onto one or more optical carriers in a same optical fiber, and transmitting the optical carrier after the modulation.

Abstract: The present invention provide an optical distribution method that includes determining, a first optical distribution frame and a second optical distribution frame, and generating first port indication information and second port indication information according to fiber patch cord setting information; and sending the first port indication information to the first optical distribution frame, sending the second port indication information to the second optical distribution frame, receiving a first port identity and a fiber patch cord identity corresponding to the first port identity which are sent by the first optical distribution frame, and receiving a second port identity and a fiber patch cord identity corresponding to the second port identity which are sent by the second optical distribution frame.

Abstract: The embodiments of the present invention disclose methods and apparatuses for mapping processing and de-mapping processing in an optical transport network. A Lower Order Optical Channel Data Unit (LO ODU) signal is mapped into a payload area of an Optical Channel Data Tributary (ODTU) signal in units of M bytes. M is equal to the number of tributary slots of a Higher Order Optical Channel Payload Unit (HO OPU) that are to be occupied by the ODTU signal, and M is an integer larger than 1. Overhead information is encapsulated to an overhead area of the ODTU signal. Thereafter, the ODTU signal is multiplexed into the HO OPU. In this way, an efficient and universal mode for mapping the LO ODU to the HO OPU is provided.

Abstract: A wavelength division multiplexing passive optical network (WPON) comprising an optical line terminal (OLT) and a plurality of optical network units (ONUs) coupled to the OLT via a power optical splitter. The OLT is configured to monitor wavelengths in use by the ONUs and to divide upstream traffic from the ONUs into multiple channels using tunable filters. Also disclosed is an OLT for a PON, the OLT comprising a plurality of receivers and a plurality of tunable filters corresponding to each of the receivers. The OLT also comprises channel control logic coupled to the tunable filters, wherein the channel control logic is configured to detect a plurality of wavelengths in use for upstream traffic in the PON and to divide the upstream traffic into multiple channels using the tunable filters. Included is a method for managing upstream traffic in a PON, the method comprising monitoring, by a processor, wavelengths in use for upstream traffic in the PON.

Abstract: An ONU includes a CDR that regenerates a clock based on a signal from an OLT, an oscillator that generates an internal clock, a time stamp counter that manages a time of the ONU based on the clock in a period in which the CDR regenerates the clock and manages the time of the ONU based on the internal clock in a period in which the CDR does not regenerate the clock, an MPCP control unit that decides, when a Cyclic Sleep mode is set, a receiver-time synchronization time that is a period in which the receiver is normally operated within a sleep time, based on a difference between a time stamp value included in the signal transmitted from the OLT and a time stamp managed by the time stamp counter, and a power-saving control unit that controls the receiver to be normally operated in the receiver-time synchronization time.

Abstract: One embodiment provides a pluggable optical line terminal (OLT). The OLT includes a bi-directional optical transceiver configured to transmit optical signals to and receive optical signals from a number of optical network units (ONUs), an OLT chip coupled to the optical transceiver and configured to communicate with the ONUs through the optical transceiver, and a pluggable interface coupled to the OLT chip and configured to electrically interface between the OLT chip and a piece of network equipment. The optical transceiver, the OLT chip, and the pluggable interface are contained in an enclosure complying with a form factor, thereby allowing the pluggable OLT to be directly plugged into the network equipment.

Abstract: The inventive concept relates to an optical line terminal registering optical network terminals having overlapping serial numbers. The optical line terminal may include a memory storing serial number information of optical network terminals of which a registration is completed in a storage region; and a control part that if a serial number by a serial number request is received from optical network terminals, the received serial number is compared with the serial number information of the memory and if they overlap each other, a previously set preliminary identifier is allocated to the optical network terminal having an overlapping serial number.

Abstract: An apparatus comprising a path computation element (PCE) configured to perform a path computation using a wavelength converter (WC) pool information based on a dynamic WC pool model, wherein the dynamic WC pool model comprises information regarding WC pool usage state represented using a WC pool usage state vector, and wherein the information regarding WC pool usage state is communicated to the PCE using a WC usage state Type-Length-Value (TLV) that indicates an available WC in a WC pool, a used WC in the WC pool, or both. Also disclosed is a network component comprising at least one processor configured to implement a method comprising receiving a WC usage state TLV comprising information regarding WC pool usage state, establishing a WC pool usage state vector using the information in the WC usage state TLV, and calculating a WC pool connectivity matrix based on the WC usage state vector.

Abstract: Embodiments enable a network operator to use any (and a single) network management system (NMS) that it desires to manage a network having mixed fiber to the home optical network units (ONUs) and coaxial connected cable modems. For example, embodiments enable a cable company operator to use a DOCSIS (Data Over Cable Service Interface Specification) NMS (which the cable company already uses to manage its DOCSIS network) to manage such mixed network, by a simple addition of a DOCSIS Mediation Layer (DML) module between the NMS and the optical line terminal (OLT). On the other hand, embodiments enable a telephone company operator to use a standard EPON (Ethernet Passive Optical Network) OLT NMS with minor OLT and OAM (Operations, Administration, and Maintenance) protocol modifications to manage the same mixed network.

Abstract: A central-office termination apparatus includes plural termination devices and a termination device distributor. Each termination device includes a buffer, a subscriber-terminal terminator distributor and a scheduler. The buffer has a through queue and one or more switching queues. The subscriber-terminal terminator distributor transfers a packet meant for one subscriber-terminal terminator under switching to the switching queue, and transfers another packet meant for another subscriber-terminal terminator not under switching to the through queue. The scheduler reads out packets from the switching and through queues. The termination device distributor transfers a received packet to a termination device having the subscriber-terminal terminator registered for which that packet is meant.

Abstract: A system, a method and a related device for signal transmission are provided in order to improve utilization efficiency of the fiber.

Abstract: Methods and apparatus to deploy fiber optic based access networks are disclosed. An example access network comprises a first fiber optic cable segment to couple an optical access head-end to a first pedestal and to transport user data, a second fiber optic cable segment to couple the first pedestal to a second pedestal and to transport a first portion of the user data to the second pedestal, a drop cable segment to couple the first pedestal to a customer premises and to transport a second portion of the user data to the customer premises, and a switch at the first pedestal to route the first portion of the user data between the first and second fiber optic cable segments and to route the second portion of the user data between the first fiber optic cable segment and the drop cable segment.

Abstract: A remote control unit generates a first beam which a user points at one of a plurality of information appliances to select that appliance. After selecting the desired appliance, the user then actuates a button on a control keypad on the remote control unit to cause the unit to generate a second, modulated beam. The remote control unit modulates the second beam in accordance with a desired functionality of the information appliance to control the appliance accordingly.

Abstract: Methods, systems, and computer-readable media can facilitate digitizing a broadcast transmission and transporting the digitized broadcast transmission along with one or more digitized narrowcast transmissions to a subscriber. In embodiments, a digitized broadcast transmission and one or more digitized narrowcast transmissions can be separately demodulated and the transmissions can be combined at one or more receiving nodes. In embodiments, a digitized broadcast transmission can be combined with one or more digitized narrowcast transmissions. Lossless compression and de-compression techniques can be used to optimally transport digitized broadcast and narrowcast signals.

Abstract: Methods, systems, and computer readable media can be operable to facilitate the remote modulation of pre-transformed data. In embodiments, a CMTS can provide pre-transformed data in the frequency domain to a transmitter or receiver. Multiple network components can be bypassed when pre-transformed data is delivered directly to a transmitter or receiver, thus improving the amount of network capacity and available network resources. In embodiments, pre-transformed data can be transformed and modulated at a receiver.

Abstract: A transmitter, using frequency sub-band coding, can output a plurality of narrowcast and/or broadcast signals to a plurality of sub-groups or nodes along a single optical link. The transmitter can output the plurality of signals as multiple slices of spectrum, wherein each slice of spectrum is designated for a particular sub-group or node. The transmitter can further instruct each receiver or node as to which slice of spectrum to use and at which frequency to output the associated signal information to its intended subscribers. Thus, a single transmitter can feed narrowcast information to multiple nodes or receivers along a single optical link. In embodiments, channels can be monitored and manipulated on a channel-by-channel basis, and channels delivered using different network solutions can be combined.

Abstract: A system and method for managing the optical layer network data communications of an optical fiber data network by an optical transceiver module is disclosed. The management of the optical layer network data communications comprising data link layer functions or layer 2 functions in an OSI model. Benefits include reduction in reduced cost of network deployments from consolidation of network equipment, such as switches, and reduction in power consumed as well as enabling point-to-multipoint network connections from previously only point-to-point network connection.

Abstract: A method for time synchronization on a passive optical network is disclosed, including: an optical line terminal (OLT) receives clock information sent by a first optical network unit (ONU); the OLT adjusts local time of the OLT according to the clock information, to implement clock synchronization between the OLT and the first ONU; the OLT sends the clock information to a second ONU, to implement clock synchronization between the second ONU and the OLT. The OLT in an embodiment of the present invention does not need to obtain clock signals from an upper network and the clock information does not need to be transmitted in a multi-level mode over a packet network; therefore, the precision of ToD can be greatly increased.

Abstract: An Optical Line Termination (OLT) system in a multi-wavelength Passive Optical Network (PON) includes a protection port for protecting a set of OLT ports without the use of a physical switch. The protection port has a tunable transceiver. The OLT system detects a failure of one of the OLT ports, which was originally adapted to transmit downstream traffic to a subset of ONUs on a downstream wavelength and to receive upstream traffic from the subset of ONUs on an upstream wavelength. In response to the detection, the OLT system tunes the protection port to the downstream wavelength for transmission and to the upstream wavelength for reception, and resumes communication between the OLT system and the subset of ONUs through the protection port instead of the OLT port.

Abstract: A modular interconnect includes an mn-by-mn fully connected, direct broadcast, point-to-point, all-to-all interconnect fabric, wherein the mn-by-mn fully connected, direct broadcast, point-to-point, all-to-all interconnect fabric is non-blocking and congestion free, and wherein m is an integer?2 and n is an integer?2. Operating the modular interconnect includes distributing each of mn inputs to each and every one of mn outputs.

Abstract: Provided is a network system including a subscriber apparatus and a station-side apparatus connected with the subscriber apparatus via an optical line. The subscriber apparatus includes a transceiver for receiving an instruction to change wavelengths for signals to be sent and received, receiving a downstream signal sent from the station-side apparatus and having a wavelength designated by the instruction, and sending an upstream signal having a wavelength designated by the instruction to the station-side apparatus. The subscriber apparatus includes a controller for identifying at least one property of the received downstream signal and determining wavelengths for signals to be sent and received based on the identified at least one property.

Abstract: Modular kit of devices for variable distribution, mixing and monitoring of optical signals in the Internet and other networks is formed by an optical module interconnected with a control electronic module of the electronic system with two redundant power supply sources, which is subsequently interconnected with the communication computer module equipped with the user communication interface and the machine communication interface. Optical module has N optical inputs and M optical outputs where N and M are non-zero natural numbers, and in total the optical module contains N×M of 2×2 type Mach-Zender interferometer optical switching elements. Each of them has two optical inputs, two optical outputs and one electric input. Optical switching elements are mutually interconnected in a grid. Control electronic module is formed by N×M pulse-width modulators connected via an interface module to the communication computer module and to the power supply distribution block.

Abstract: A method for communicating in a passive optical network (PON), includes receiving traffic from a plurality of optical network units (ONUs) transmitting in an upstream transmission channel, wherein each of the ONUs may transmit at any wavelength within a wavelength band associated with the upstream transmission channel. The method also includes dividing the upstream transmission channel into a plurality of sub-channels, that each include a subset of the wavelength band associated with the upstream transmission channel. The method further includes determining the identity of each of the plurality of ONUs transmitting in each of the sub-channels, assigning a plurality of ONUs transmitting in the upstream transmission channel to each of at least two of the sub-channels based on the determination of the ONUs transmitting in that sub-channel, and allocating transmission timeslots for time-shared transmission by the ONUs in one or more of the sub-channels.