  In a recent paper [Phys. Rev. B{\bf57}, 3375 (1998)], we examined in detail
the nonlinear (electrical) dc response of a random resistor cum tunneling bond
network ($RRTN$, introduced by us elsewhere to explain nonlinear response of
metal-insulator type mixtures). In this work which is a sequel to that paper,
we consider the ac response of the $RRTN$-based correlated $RC$ ($CRC$) model.
Numerical solutions of the Kirchoff's laws for the $CRC$ model give a power-law
exponent (= 0.7 near $p = p_c$) of the modulus of the complex ac conductance at
moderately low frequencies, in conformity with experiments on various types of
disordered systems. But, at very low frequencies, it gives a simple quadratic
or linear dependence on the frequency depending upon whether the system is
percolating or not. We do also discuss the effective medium approximation
($EMA$) of our $CRC$ and the traditional random $RC$ network model, and discuss
their comparative successes and shortcomings.
