  Recently, A. Jerez, P. Vitushinsky and M. Lavagna [Phys. Rev. Lett. 95,
127203 (2005)] claimed that the transmission phase through a quantum fot, as
measured via the Aharonov-Bohm interferometer, differs from the phase which
determines the corresponding conductance. Here we show that this claim is wrong
for the single level Anderson model, which is usually used to describe the
quantum dot. So far, there exists no derivation of this claim from any explicit
theoretical model.
