Transmode Systems Ab

Tommy Lindblad

The invention concerns a method of connecting a subscriber unit () to a fiberoptic communication network () via a fiberoptic interface device () adapted to function as an interface device () in a coarse wavelength division multiplex (CWDM) system. The interface device () comprises an electric circuit arrangement () and a first () and a second () receiving section adapted to receive transceiver modules (). According to the method, an opto-electric transceiver module () is arranged in said first receiving section () and connected to said fiberoptic communication network (). A first electric transceiver module () is provided and arranged in said second receiving section (). The interface device () is connected, via said electric transceiver module (), to said subscriber unit () via electrical conduction paths (). The invention also concerns a method of testing the function of said interface device ().

Methods of connecting and testing interfaces for CWDM fiber-optic systems

The invention concerns an interface device for a fiberoptic communication network. The interface device comprises an electric circuit arrangementa first receiving sectionfor receiving a first transceiver moduleand a second receiving sectionfor receiving a second transceiver moduleThe interface device also comprises a switching unitfor switching said electric circuit arrangement between at least a first and a second state. Furthermore, the interface device includes a controllerarranged to automatically control the switching unitin response to at least one control signal such that said first or second states are selected depending on whether at least one control signal is received indicating either that no transceiver moduleis attached to said second receiving sectionor that no optical signal above a certain signal level is received by a transceiver moduleattached to said second receiving sectionThe invention also concerns methods of using such an interface device.

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Norsborg, Sweden

Tommy Lindblad