  We consider the analogy between the topological phase transition which occurs
as a function of spatial coordinate on a surface of a non-trivial insulator,
and the one which occurs in the bulk due to the change of internal parameters
(such as crystal field and spin-orbit coupling). In both cases the system
exhibits a Dirac cone, which is the universal manifestation of topological
phase transition, independently on the type of driving parameters. In
particular, this leads to a simple way of determining the topological class
based solely on the bulk information even for the systems with translational
symmetry broken by atomic disorder or by strong electron correlations. Here we
demonstrate this on example of the zinc-blende related semiconductors by means
of the {\it ab-initio} fully-relativistic band structure calculations involving
the coherent potential approximation (CPA) technique.
