3m Innovative Properties Company

Michael Mansholt

Michael Bake

Johannes Fink

Friedrich Wilhelm Denter

Lars Schrix

Ulrich Lutterkordt

Manfred Bauer

Manfred Stieglitz

Manuel Steinbrink

Klaus Werner Bohle

Udo Bendig

Wolf-Dieter Fischer

Achim Halfmann

Axel Koruschowitz

Peter R Orda

Douglas J Denne

Fiber network for interrogating fiber-optic sensors in a first Passive Optical Network (PON) and in a second PON, the fiber network comprising a test signal transceiver for emitting query signals and for receiving response signals, a first PON and a second PON. Each PON comprises a light source for generating telecommunication signals and a fiber-optic sensor. Each PON can transmit the telecommunication signals to a plurality of subscribers, and is optically connected to the test signal transceiver such that the query signals can be fed into the respective PON and propagate in the PON to the fiber-optic sensor, and such that the test signal transceiver can receive response signals from the fiber-optic sensor through the PON. The fiber network further comprises a query signal splitter, optically connected to the test signal transceiver and to the PONs such that it can feed a query signal into the PONs simultaneously, and such that it can feed response signals from the PONs into the test signal transceiver.

Fibre network comprising sensors

Method of performing a challenge-response process, comprising, in this sequence, the steps of a) providing a first challenge-response pair () on a source device (), assigned to a responding device (); b) loading the first challenge-response pair () from the source device () to a challenging device (), while the source device () is operationally connected to the challenging device (); c) performing a challenge-response process between the challenging device () and the responding devices () to which the first challenge-response pair () is assigned, d) loading one or more second challenge-response pairs () from a source device () to the challenging device (), while the source device () is operationally connected to the challenging device (), wherein the step of loading the first challenge-response pair () from the source device () to a challenging device () is performed before the challenging device () has received any information from one of the responding devices (), to which the first challenge-response pair () is assigned.

Challenge-response system for maintenance operations via responder for telecommunications cabinet

A contact bank, which can be terminated, or is terminated, at least one terminal module serving for signal communication and being adapted to allow telecommunications lines to be connected therewith, or at least one supplementary module, of a telecommunications distribution point, which is connected to a terminal module, whereby the contact bank further is mountable or mounted in the telecommunications distribution point, includes: (a) a plurality of tapping contacts directly and permanently electrically connected to the contacts of the module in the terminated condition of said contact bank; (b) a smaller number of outlet contacts than of tapping contacts; (c) a plurality of remote-controllable switches for selectively electrically connecting said outlet contacts to said tapping contacts; and (d) a control device for controlling the plurality of switches.

Contact bank

Growing community of inventors

Kö'ln, Germany

Michael Mansholt