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Optical Systems

Communications-method-and-network-with-frequency-allocation

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Communications method and network with frequency allocation

Details

Inventors: Audouin, Olivier; Gabriagues, Jean-Michael; Sotom, Michel;
Assignee: Alcatel N.V. (Amsterdam, NL)
Primary Examiner: Pascal; Leslie
Assistant Examiner:
Attorney, Agent or Firm: Robbins, Berliner & Carson

Calls are made in known manner between terminals in the form of information-carrying modulation applied to emission waves that travel along common transmission lines. An emission frequency (F(2P-1)) is allocated to each terminal for each call. According to the invention, a marking wave is supplied to all of the terminals while no call is yet being set up, thereby marking an emission frequency. When a new call is being set up, the marked frequency is allocated for the new call to at least one of the terminals that are to participate in the call. The invention is particularly applicable to communications by means of optical fibers.

DETAILED DESCRIPTION To this end, the present invention provides, in particular, a communications method with frequency allocation in which a marking wave is supplied to all of the terminals, thereby marking an emission frequency while no call is being set up, and then when a new call is being set up, said marked frequency is allocated for said new call to at least one of the terminals that is to engage in the call.

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