Bull S.a.

Bull S.a. (societe Anonyme)

Gilbert Takats

Rene Baptiste

Claude Bacou

Christian Cabrol

Henri Feissel

A wall outlet (PMI.sub.1 through PMI.sub.3) for connection of an optical building wiring system is provided, including a receptacle (RI, RI.sub.3) adapted to be fixed in the baseboard (PL) of the wall, into which receptacle optical cords (CO.sub.i, CO.sub.j, CO.sub.1 through CO.sub.4) carrying information to be transmitted to a local area network of a building including a plurality of terminals are inserted, the cords are connected to a terminal associated with the outlet. A removable cover (CI.sub.1 through CI.sub.3) is associated with a removable carrier (SCI.sub.1) of connectors that enables the optical connection of the cords. The cover is capable of occupying a first standby position, in which it closes the front face of the receptacle, and a second active position for use where the plane of the cover forms a dihedron with the front face. The cords exit laterally relative to the receptacle on either side thereof, parallel to the baseboard. First positioning elements (GMI.sub.1 -GMI.sub.2, G.sub.1, EG.sub.2) cooperate with second positioning elements (GI.sub.1 -GI.sub.6, EC.sub. 1 -EC.sub.2, EC.sub.3 -EC.sub.4), belonging to the receptacle, in such a way as to shift the cover from the standby position to the position for use.

Wall outlet for connection for optical wiring system of buildings

A gateway device for connecting a computer bus to a high-speed fiber optic ring network including an I/O host module of the computer connected to the computer bus and having at least one external communication bus for carrying both data and control blocks containing parameters relative to the composition of data frames. The gateway device also includes an adapter device physically connected to the network, and an interface which ensures transfer of the data and control blocks between the I/O host module and the adapter device. The adapter device includes a memory for storing the data frames before they are transmitted to the network and after they are received from the network, and a transfer management controller for managing the transfer of data frames between the I/O host module and the network. The controller includes a control bus which carries the control blocks and the control characters of the data frames. The adapter device further includes a high-speed bus which transports the data. The transfer interface is connected to the communication bus as well as to the high-speed bus and the control bus.

Gateway device for connecting a computer bus to a ring network

An optoelectronic transducer is proposed which includes a PIN diode (2) that delivers a current that is proportional to a light signal that is received. The diode is connected to the input of an inverting amplifier (4) that delivers a voltage signal v.sub.s. A negative feedback means of the transfer impedance type (6) is connected across the inverting amplifier. The transducer further includes a stabilizing means (8) for the amplifier gain and a temperature drift compensating means (10) for compensating for the drift in amplifier temperature. The stabilizing means (8) includes a detector (26, 28, 32) for the high peak of the signal v.sub.s, and the temperature drift compensating means (10) includes a filter means (38) for producing the means value v.sub.m of the signal v.sub.s, and a comparator (40) that receives the signals v.sub.s and v.sub.m and delivers a signal that reproduces the interference of the light signal that has been received. The temperature drift compensating (10) also includes a carrier wavedetection (cs) with automatic control (42). This automatic control enables very high speed detection of the carrier wave not only at a high level, but at a low level as well.

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Le Mesnis Saint Denis, France

Gilbert Takats