  We assume that the amplitude of the caustics in redshift space is a sum of
two components: the first one can be predicted by the spherical infall model
with no random motion, and the second is due to the random motion distribution.
Smooth model curves are used to estimate the maximum values of the first
component for the Coma cluster. Then, an approximation of the radial component
of the infall velocity --based on the above curves-- is derived and a mass
profile of the cluster is calculated. This mass profile, that is an upper limit
for the spherical infall model, combined with estimations given by other
authors provides an approximation of a lower limit for the mass of the system.
