Cisco Technology, Inc.

Cisco Systems (sweden) Aktiebolag

Telefonaktiebolaget Lm Ericsson (publ)

Fredrik Lindgren

Jacob Österling

Bengt Johansson

Lars Egnell

Dag Bonnedal

Ola Hulten

Fredrik Liden

Fredrik Linden

An add/drop node of an optical WDN-network which has two fiber paths for light of a plurality of channels propagating in opposite directions comprises two add/drop modules () for each of the channels. All the modules are identically constructed. Each module comprises an add device () for adding light to one of the paths and a drop device () for deflecting a portion of light from a second one of the paths. A module comprises a house () enclosing the add device and the drop device. A first fixed connector () is attached to the house for connection in the first path and to a an optical fiber () which extends freely from the house and has a first free connector () at its free end to be attached to the fixed connector of a neighboring add/drop module for continuing the first path through the considered add/drop module to the neighboring module. In the same way a second fixed connector is attached to the house for connection in the second path and to a second optical fiber which extends freely from the house and has a second free connector at its free end to be attached to the fixed second connector of a neighboring add/drop module for continuing the second path through the considered add/drop module to the neighboring module.

Connection of on an add/drop node

An add/drop node used in an optical network having two fiber paths for carrying light corresponding to a plurality of channels in opposite directions may include a pair of add/drop modules that correspond to one of the plurality of channels. This arrangement advantageously provides a simple approach for connecting the components of an add/drop node.

Connection of an add/drop node

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Stockholm, Sweden

Fredrik Lindgren