  Recently bulk Randall-Sundrum theories with the gauge group $SU(2)_L \times
SU(2)_R \times U(1)_{B-L}$ have drawn a lot of interest as an alternative to
electroweak symmetry breaking mechanism. These models are in better agreement
with electroweak precision data since custodial isospin symmetry on the IR
brane is protected by the extended bulk gauge symmetry. We comprehensively
study, in the $S^1/\ZZ$ orbifold, the bulk gauge and fermion fields with the
general boundary conditions as well as the bulk and localized mass terms.
Master equations to determine the Kaluza-Klein (KK) mass spectra are derived
without any approximation, which is an important basic step for various
phenomenologies at high energy colliders. The correspondence between orbifold
boundary conditions and localized mass terms is demonstrated not only in the
gauge sector but also in the fermion sector. As the localized mass increases,
the first KK fermion mass is shown to decrease while the first KK gauge boson
mass to increase. The degree of gauge coupling universality violation is
computed to be small in most parameter space, and its correlation with the mass
difference between the top quark and light quark KK mode is also studied.
