The transformation of space and time in the special theory of relativity is formally compared to the transformation of voltage and current in the transmission-line theory. The Lorentz transformation corresponds to an equivalent circuit. The transient response of this circuit leads to an interpretation of the relativistic space-time transformation that deviates from the conventional one. Transformations corresponding to reflexion-free line-termination do not allow simultaneousness in inertial systems. Such transformations are always connected to the Doppler effect. The energy loss connected to the red shift of the light from distant galaxies appears to the observer as a pure kinematic effect. The clock or twin-paradox does not exist. The calculation of the Doppler frequency and the aberration requires a correction.