We examine the contribution of flat spectrum radio sources (FSRSs), or
blazars, to the diffuse gamma-ray background (DGRB), prompted by the
association of the extragalactic gamma-ray sources detected by the EGR
ET instrument aboard the Compton Gamma Ray Observatory (CGRO) with thi
s class of objects by using their well-studied log N-log S distributio
n. The basic assumption of our study are that (1) there exists steady
state gamma-ray emission at the EGRET energy band from the entire popu
lation of FSRSs with gamma-ray luminosity that is proportional to thei
r radio luminosity, i.e., (vF(v))(100 MeV) = f(vF(v))(5 GHz); (2) the
ensemble of blazars produce the DGRB. Under these assumptions, the est
imated average value of the proportionality constant is [f] similar or
equal to 70, compared to a mean observed value of [f](obs) similar or
equal to 750 seen among the EGRET-detected blazars. We explore the im
plications of this result for AGN models and address the results that
should be achieved by the next generation of gamma-ray satellites.