Abstract: The invention concerns a method of connecting a subscriber unit (12) to a fiberoptic communication network (14) via a fiberoptic interface device (30) adapted to function as an interface device (30) in a coarse wavelength division multiplex (CWDM) system. The interface device (30) comprises an electric circuit arrangement (32) and a first (34) and a second (36) receiving section adapted to receive transceiver modules (24, 70). According to the method, an opto-electric transceiver module (24) is arranged in said first receiving section (34) and connected to said fiberoptic communication network (14). A first electric transceiver module (70) is provided and arranged in said second receiving section (36). The interface device (30) is connected, via said electric transceiver module (70), to said subscriber unit (12) via electrical conduction paths (82, 86). The invention also concerns a method of testing the function of said interface device (30).

Abstract: The invention concerns an interface device for a fiberoptic communication network. The interface device comprises an electric circuit arrangement 32, a first receiving section 34 for receiving a first transceiver module 24 and a second receiving section 36 for receiving a second transceiver module 26. The interface device also comprises a switching unit 54 for switching said electric circuit arrangement between at least a first and a second state. Furthermore, the interface device includes a controller 56 arranged to automatically control the switching unit 54 in 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 module 26 is attached to said second receiving section 36 or that no optical signal above a certain signal level is received by a transceiver module 26 attached to said second receiving section 36.

Abstract: The invention concerns a method of connecting a subscriber unit (12) to a fiberoptic communication network (14) via a fiberoptic interface device (30) adapted to function as an interface device (30) in a coarse wavelength division multiplex (CWDM) system. The interface device (30) comprises an electric circuit arrangement (32) and a first (34) and a second (36) receiving section adapted to receive transceiver modules (24, 70). According to the method, an opto-electric transceiver module (24) is arranged in said first receiving section (34) and connected to said fiberoptic communication network (14). A first electric transceiver module (70) is provided and arranged in said second receiving section (36). The interface device (30) is connected, via said electric transceiver module (70), to said subscriber unit (12) via electrical conduction paths (82, 86). The invention also concerns a method of testing the function of said interface device (30).

Abstract: The invention concerns an interface device for a fiberoptic communication network. The interface device comprises an electric circuit arrangement 32, a first receiving section 34 for receiving a first transceiver module 24 and a second receiving section 36 for receiving a second transceiver module 26. The interface device also comprises a switching unit 54 for switching said electric circuit arrangement between at least a first and a second state. Furthermore, the interface device includes a controller 56 arranged to automatically control the switching unit 54 in 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 module 26 is attached to said second receiving section 36 or that no optical signal above a certain signal level is received by a transceiver module 26 attached to said second receiving section 36.