Abstract: A remote surveillance utilizing signalling incorporated in traffic and concerns more particularly digital links using a prohibited configuration code for the line signal. The purpose is to produce a system consisting of periodically incorporating an interrogation identifier containing a prohibited configuration in the line signal at the transmitter terminal, recognizing the interrogation identifiers as they pass through equipment under remote surveillance, modifying one interrogation identifier out of r by equipment that has remote surveillance data to be transmitted, using the interrogation identifiers reaching the receiving terminal intact to determine those time slots occupied by the remote surveillance signal and extracting the identifiers occupying these time slots for decoding the remote surveillance.

Abstract: The invention relates telecommunications. It concerns in particular the cutting of optical fibre. It provides a hand tool which is generally shaped like pincers whose two legs move apart during operation, the optical fibre being fixed to each of the free ends of the legs which stretch it and press it against a rounded forming part fixed to one of the legs while a knife comes up to the forming part to start breaking the fibre by scoring it, all these operations being controlled by operating a single trigger lever. It applies to the forming of connections at the ends of the optical fibres.

Abstract: Device for synchronizing a receiver of digital data which serves to identify the beginning of the coding word, for example a level received, hence attributing to each pulse a correct weight in a manner such as to confer on each sample received an amplitude corresponding exactly to the amplitude of the sample taken at the emission, or more generally, for attributing to each pulse a content of data corresponding to the coding at the emission, for example the primary color in a trichromatic color transmission.