  The total cross section of the process $e^+e^- \to p\bar{p}$ is calculated
within the energy range close to the mass of $\psi(3770)$ charmonium state. It
was shown that the main contribution to this cross section comes from three
gluon mechanism which is also responsible of the large phase with respect to
the Born amplitude. This phase provides the characteristic dip behaviour of the
cross section in contrast to the usual Breit-Wigner peak shape. OZI-allowed
mechanism with D-mesons in the intermediate state was also estimated and gives
relatively small contribution to the cross section and to the phase.
