  Nucleon-antinucleon optical potential, which explains the experimental data
for the processes $e^{+}e^{-}\rightarrow p\bar{p}$ and
$e^{+}e^{-}\rightarrow\mbox{pions}$ near the threshold of $p\bar{p}$ pair
production, is suggested. To obtain this potential we have used the available
experimental data for $p\bar{p}$ scattering, $p\bar{p}$ pair production in
$e^{+}e^{-}$ annihilation, and the ratio of electromagnetic form factors of a
proton in the timelike region. It turns out that final-state interaction via
the optical potential allows one to reproduce the available experimental data
with good accuracy. Our results for the cross sections of $e^{+}e^{-}\to6\pi$
process near the threshold of $p\bar{p}$ pair production are in agreement with
the recent experiments.
