  We apply the jet model developed in the preceding paper of Zdziarski et al.
to the hard-state emission spectra of Cyg X-1. We augment the model for the
analytical treatment of the particle evolution beyond the energy dissipation
region, and allow for various forms of the acceleration rate. We calculate the
resulting electron and emission spectra as functions of the jet height, along
with the emission spectra integrated over the outflow. The model accounts well
for the observed radio, infrared, and GeV fluxes of the source, although the
available data do not provide unique constraints on the model free parameters.
The contribution of the jet emission in the UV--to--X-ray range turns out to be
in all the cases negligible compared to the radiative output of the accretion
component. Nevertheless, we find out that it is possible to account for the
observed flux of Cyg X-1 at MeV energies by synchrotron jet emission, in accord
with the recent claims of the detection of strong linear polarization of the
source in that range. However, this is possible only assuming a very efficient
particle acceleration leading to the formation of flat electron spectra, and
jet magnetic fields much above the equipartition level.
