  The conditions are discussed for which an ensemble of interacting oscillators
may demonstrate the Landau-Hopf scenario of successive birth of multi-frequency
quasi-periodic motions. A model is proposed that is a network of five globally
coupled oscillators characterized by controlled degree of activation of
individual oscillators. Illustrations are given for successive birth of tori of
increasing dimension via quasi-periodic Hopf bifurcations.

Chaotic Dynamics