Thomson-csf Telephone

Alcatel N.v.

Alcatel Business Systems

Raphael J Roux

Bernard Gilles

Jose A Paulet

Philippe Kersale

Pascal Le Page

Ji-Yong Wu

Marie-Pierre Le Guen

A chaining arrangement between intermediate modules (14), particularly of the repeater type, servicing transceiver terminals (0) communicating via a common, digital, packet transmission link (LP), in a communications installation. Each module has an access monitoring signal input (acki) linked to the output of a first individual concentrator logical circuit (15), this circuit including 'p' inputs each capable of being linked to an access monitoring signal output (acko) of 'p' different modules. Each module has its access monitoring signal output linked to a scattering circuit (16) making it possible to simultaneously drive the access monitoring signal inputs of 'p' different modules.

Chaining arrangement between intermediate modules, particularly of

Method and device for managing access to the transmission medium of a multiservice distributed switching network adapted to switch traffic in synchronous circuit-switched mode and in synchronous or asynchronous packet-switched mode, the architecture of the network being based on a transmission medium time-shared between different stations characterized in that: (1) the transmission medium is synchronous and structured in frames in turn structured in time slots in turn structured in time cells, the latter being sized to contain a communication entity which can be either a circuit-switched cell or a segmented packet-switched cell, (2) an ideal time slot for access to the transmission medium in packet-switched mode is assigned to the respective stations communicating within the network, and (3) in each time cell and for all stations transmission medium access arbitration is applied to procure priority access to this medium for circuit-switched cells available at this time in any station.

Method and device for managing access to the transmission medium of a

The interface of the invention comprises a power supply circuit (16) which is a symmetrical amplifier circuit, and a hybrid circuit (29) controlling the power supply circuit in DC and in AC. The hybrid includes a phase shifter circuit (44, 45) simulating long lines. Application: private telephony.

Subscriber circuit link interface for an automatic telephone exchange

A ringing signal generator for a subscriber telephone set comprising a switch switching the input signal, followed by a phase shifter and two symmetrical amplifiers having a very high output impedance at rest. The lines are driven through isolating capacitors.

Ringing signal generator for a subscriber telephone set

The connecting device according to the present invention comprises for a two wire to four wire converter which connects the reception channel of a private network to the public network via an amplifier, whose symmetrical outputs are connected to the public network by capacitors, the gain loss due to these capacitors being compensated by a second amplifier. For the transmission channel a third amplifier has inputs connected to the public network by capacitors and an output connected to one input of a fourth amplifier, whose other input is connected by a phase shifting network to the reception channel.

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Colombes, France

Raphael J Roux