Thomson-csf

Thomson-csf Telephone

Francois Tarbouriech

Claude Athenes

Thierry Grenot

Gerard Poux

In a device for the transmission, by an asynchronous network, notably a network of the ATM type, of signalling data elements, channel by channel, assembled in a multiframe transmitted synchronously in out-of-band mode, the information elements are conveyed, in the asynchronous network, in packets of data bits, each, packet being formed by an information cell including, firstly, a header carrying an address and, secondly, a useful field carrying the information to be transmitted. On a transmission side, the device includes an apparatus for acquiring signalling data elements of each channel of the multiframe; a device to detect changes in the state of these data elements; and a device for the generation, on the network, at each change thus detected, of an information cell containing the new signalling data element and the address associated with the corresponding channel. On a reception side, the device includes an apparatus for acquiring, from the network, the information cells containing signalling data elements; a device to memorize these signalling data elements between each corresponding change in state; and a device to insert the data elements thus memorized into a multiframe and to transmit this multiframe synchronously in an out-of-band mode.

Device for the transmission by an asynchronous network, notably an ATM

A logic selection module for forming the interface between the two central units and eight selection circuits of an electronic time automatic telephone switchboard and which comprises means for selecting the calling central unit, means for connecting the thus selected central unit, means for decoding the address of one of the eight selection circuits to which the module is connected in the signal received from the thus selected central unit and means for transmitting the marking signals received from the central unit to the said circuit, whose address has been decoded.

Growing community of inventors

Les Ulis, France

Francois Tarbouriech