Protection switching based on SNR calculations

Multiplex transmission system and connection method between ports for multiplex transmission system

Handling band spectrum failures in a C+L band photonic line system

Spectrum coordination in optical line protection to minimize optical transceiver retuning

PATH SWITCHING APPARATUS AND PATH SWITCHING METHOD

Optical protection switch with broadcast multi-directional capability

Optical protection switch with broadcast multi-directional capability

Physical path control in hierarchical networks

Optical line terminal, and signal transmission method and device

Optical protection switch with broadcast multi-directional capability

Optical add/drop multiplexer branching unit

Systems and methods for optical dark section conditioning

Transmission apparatus and method

Systems and methods for optical dark section conditioning

Signalling in optical transmission networks

Protection system, method and apparatus for optical network

Protection device and protection method for optical network

STATUS LINK FOR MULTI-CHANNEL OPTICAL COMMUNICATION SYSTEMS

METHOD OF ASSESSING FAILURE IN TRANSMISSION PATH OPTICAL FIBER, AND APPARATUS OF SAME

Fiber sensing system with self-detection mechanism

Centrally Managed, Self-Survivable Wavelength Division Multiplexed Passive Optical Network

Optical transmission systems, devices, and methods

WDM systems and methods

Wavelength division multiplexer and regenerative repeating method in wavelength division multiplexing network

OPTICAL TRANSMISSION SYSTEM, NODE DEVICE, AND GMPLS CONTROL METHOD

Method and system for efficient provisioning of multiple services for multiple failure restoration in multi-layer mesh networks

Method for protecting cross-ring service in optical network

Status link for multi-channel optical communication systems

System and Method for Managing Power in an Optical Network

Method and system for increasing downstream bandwidth in an optical network

System and method for managing network components in a hybrid passive optical network

Shared multi-lambda source for WDM PON

Protection switching arrangement for an optical switching system

Optical transmission equipment preventing malfunction in recovery from fault

Hardware functional partitioning in a system platform of a telecommunication network element

WDM systems and methods

Communication apparatus and communication system

Methof for securing an optical telecommunication ring network and communication node amplifying communication node and traffic concentrator of a secured optical telecommunication ring network

Availability aware cost modeling for optical core networks

Wavelength conversion for optical path protection