An electro-optical (EO) interconnect assembly includes an optical fiber, and first and second EO transceivers. The first and second EO transceivers, which are coupled to respective ends of the optical fiber, are configured to (i) connect to respective first and second network devices, (ii) exchange electrical signals with the first and second network devices, (iii) convert between the electrical signals and optical signals, and exchange the optical signals with one another over the optical fiber, and (iv) conduct with one another, over the optical fiber, a secure challenge-response transaction, and to initiate a responsive action upon failure of the challenge-response transaction.

A fully connectorized optic fiber tap assembly is described that includes a first upstream connector interface configured to receive a downstream connector of a first upstream optic fiber line, and a first downstream connector interface configured to receive an upstream connector of a first downstream optic fiber line. The tap assembly further includes a set of service drop line connector interfaces. Moreover, an optic fiber tap of the assembly is configured to: receive an optical signal from the upstream connector interface, extract a portion of the optical signal, direct the extracted portion of the optical signal to the set of service drop line connector interfaces, and pass a remaining portion of the optical signal to the downstream connector interface. The fully connectorized optic fiber tap assembly is configured to be connected to the first upstream optic fiber line and the first downstream optic fiber line without splicing.

A fully connectorized optic fiber tap assembly is described that includes a first upstream connector interface configured to receive a downstream connector of a first upstream optic fiber line, and a first downstream connector interface configured to receive an upstream connector of a first downstream optic fiber line. The tap assembly further includes a set of service drop line connector interfaces. Moreover, an optic fiber tap of the assembly is configured to: receive an optical signal from the upstream connector interface, extract a portion of the optical signal, direct the extracted portion of the optical signal to the set of service drop line connector interfaces, and pass a remaining portion of the optical signal to the downstream connector interface. The fully connectorized optic fiber tap assembly is configured to be connected to the first upstream optic fiber line and the first downstream optic fiber line without splicing.

Systems and methods include determining a current state of a network; determining a new state for the network having an improved cost relative to the current state; determining a defragmentation plan to move the network from the current state to the new state, the defragmentation plan including a sequence of steps; and, responsive to an event that presents an opportunity, implementing one or more steps of the sequence of steps. The implementing is conditioned on occurrence of the opportunity.

Systems and methods include determining a current state of a network; determining a new state for the network having an improved cost relative to the current state; determining a defragmentation plan to move the network from the current state to the new state, the defragmentation plan including a sequence of steps; and, responsive to an event that presents an opportunity, implementing one or more steps of the sequence of steps. The implementing is conditioned on occurrence of the opportunity.

An example system includes a transceiver and a microcontroller. The microcontroller is configured to receive first messages from a hub node via first network interfaces of the transceiver, and determine first logical identifiers associated with ingress data flows. Further, the microcontroller is configured to receive second messages from leaf nodes via second network interfaces of the transceiver, and determine second logical identifies associated with egress data flows. Further, the microcontroller is configured to generate a resource assignment map based on the first and logical identifiers, and to generate a command to cause the transceiver to transmit the egress data flows in accordance with the resource assignment map. The resource map indicates pairings between the ingress data flows and the egress data flows, and, for each of the pairings, a respective network resource assigned to transmit the egress data flow of the pairing to a respective one of the leaf nodes.

The purpose of the present invention is to provide an optical/RF wireless hybrid communication system and a control method capable of solving the instability of link conditions of an RF wireless link and an optical wireless link. In the optical/RF wireless hybrid communication system and the control method according to the present invention, links for data transmission are not limited to one of an RF wireless link and an optical wireless link, the quality of link conditions is determined from signal quality received through channels of both the RF wireless link and the optical wireless link, and the distribution of data to be transmitted through the respective links is determined on the basis of the determination result. Thus, the links can be flexibly switched depending on the transmission conditions such as disturbance.

An undersea fiber optic cable architecture including a beach manhole (BMH) installed at a terrestrial site, a terrestrial station connected to the BMH by a terrestrial fiber optic cable, a first landing cable extending from the BMH into territorial waters adjacent the terrestrial site and connected to a first enhanced branching unit (EBU) located in the territorial waters, a second landing cable extending from the BMH into the territorial waters and connected to a second EBU located in the territorial waters, a recovery path cable connecting the first EBU to the second EBU, a first trunk cable extending from the first EBU into international waters, and a second trunk cable extending from the second EBU into the international waters.

Provided are optical communication signal recovery techniques and a submarine optical communication recovery device may include a number of inputs, a number of outputs and a number of optical switch modules. Each input may be operable to connect to a respective optical fiber of a submarine fiber optic cable, and a number of the optical fibers carry optical signals and at least one optical fiber of the plurality of optical fibers is an unusable optical path that is unable to carry a usable optical signal. Each output may couple to another respective optical fiber, and a number of the outputs may be designated as impaired outputs. Each optical switch module of the number of optical switch modules may be operable to connect an input of the number of inputs coupled to the unusable optical path to an impaired output of the number of the impaired outputs.

An edge wavelength-switching system includes an optical switch and a wavelength selective switch. The optical switch includes a west hub-side port, an east hub-side port, a west local-side port, and an east local-side port. The wavelength selective switch includes (i) a multiplexed port optically coupled to the west local-side port and (ii) a bypass port optically coupled to the east local-side port, and (iii) a plurality of demultiplexed ports. An optical network includes a network hub including an M-by-N.sub.1 wavelength-selective switch, N.sub.1>M≥1, a first network node, and a second network node. Each of the first and second network nodes includes a respective edge wavelength-switching system. The network hub, the first network node, and the second network node are optically coupled.