Adva Optical Networking Se

Deutschetelekom Ag

Adtran Networks Se

Christophe Meyer

Sorin Tibuleac

Christian Scheerer

Henning Hinderthür

Cornelius Fuerst

Mohammad Alfiad

Sander Jansen

Paul Morkel

Cornelius Fürst

Markus Lautenschlager

Fuerst Cornelius

Markus Klumb

A system installed in a cross-border area between a provider network of a provider and a customer network of a customer includes: a smart optical network termination device (NT) at a site of the customer, wherein the smart optical NT is configured to implement a demarcation point between the customer network and the provider network, and wherein the smart optical NT is independent of a data rate passing through it and an optical interface connected to it; and a monitoring device located at a point of presence (POP) of the provider network. The smart optical NT is further configured to monitor a coupling of optical power by the customer into the provider network and to interact with the monitoring device via at least one traffic analysis point (TAP) for connectivity validation from the POP to the demarcation point.

Method and system to implement a demarcation point between a provider network and a customer network

An apparatus for management of a spectral capacity of a wavelength division multiplexing, WDM, system includes at least one pair of transmission fibers provided for transporting optical signals. Each transmission fiber of a transmission fiber pair is connected to a first port of an optical circulator having at least two additional ports and adapted to transmit an incoming optical signal entering one of its ports via its next port. WDM subsystems configured with counter-propagating assignable wavelengths are connected to associated ports of the optical circulator of the apparatus.

Method and apparatus for management of a spectral capacity of a wavelength division multiplexing system

The invention relates to a method for migrating data traffic from an existing optical WDM transmission system to a new optical WDM transmission system, the existing optical WDM transmission system using a first optical transmission band and the new optical WDM transmission system being capable of using a second optical transmission band. The second optical transmission band at least partially includes the first optical transmission band and a further extension band that does not overlap with the first optical transmission band, the method including the steps of. According to the invention, a migration filter device is used in order to connect, during a migration phase, the network nodes of the existing system and the network nodes of the new system to the network paths that have been used by the existing system. During the migration phase, both systems are operated in parallel, with the new system using the extension band only. In this way, during the migration phase, the data traffic handled by the existing system can stepwise be switched to the new system. After all data traffic has been switched to the new system, the existing system can be deinstalled. The migration filter devices can stepwise be deinstalled.

Method and device for migrating data traffic from an existing optical WDM transmission system to a new optical WDM transmission system

A wavelength division multiplexed telecommunication system with automatic compensation of chromatic dispersion in a predetermined wavelength band, said WDM telecommunication system comprising a probe signal detection unit at a receiver side adapted to detect amplitude modulated probe signals generated by a probe signal generation unit at a transmitter side with a predetermined relative phase difference and transmitted through an optical link to said receiver side; and a chromatic dispersion compensation unit adapted to compensate the chromatic dispersion in response to a relative phase difference of the amplitude modulated probe signals detected by said probe signal detection unit at the receiver side.

Wavelength division multiplexed telecommunication system with automatic compensation of chromatic dispersion

A chromatic dispersion compensation apparatus for automatic compensation of chromatic dispersion of signals transmitted via an optical link at predetermined wavelengths of WDM channels within a predetermined band. A tapping unit taps optical signals received by the chromatic dispersion compensation apparatus via the optical link at predetermined wavelengths and supply them to an optical coherent receiver adapted to tune its local oscillator to WDM channels to generate corresponding analog electrical signals of the WDM channels which are sampled by an analog digital converter to provide digital signal samples of WDM channels processed by a digital signal processor of the chromatic dispersion compensation apparatus to calculate an estimate residual chromatic dispersion value of the received optical signals. A tuneable dispersion compensation module is set to perform optical compensation of a residual chromatic dispersion of the received optical signals depending on calculated estimate residual chromatic dispersion value of the received optical signals.

Method and apparatus for automatic compensation of chromatic dispersion

Growing community of inventors

Meiningen, Germany

Christophe Meyer