The act or process of redirecting electromagnetic energy along a new path, using a conductive surface or impedance discontinuity. At a surface, the angle of the reflection equals the angle of incidence, i.e., the angle at which the incident signal strikes the plane surface of the obstacle. At the extreme, the signal reflects back towards its point of origin. See also angle of incidence and refraction. ISDN Central Office Switch NT1 NT2 NT2 NT2 NT2 NT1 NT1 NT1 PBX TA R R R R Q Q S S S S T T T T U U U U R R