In the example embodiments, test signals sent from a transmitting system are received at a receiving system. The present invention also relates to the use of these compounds for the prevention or treatment of neurological and psychiatric disorders associated with glutamate dysfunction and diseases in which metabotropic glutamate receptors are involved. The VDSL facility transport system comprises an Ethernet to VDSL Consumer Premises Equipment coupled to a DSL Access Multiplexer over a VDSL transport facility. The third device retains the communicated values. The fuel assembly has a plurality of fuel rods arranged in a square lattice pattern, each fuel rod being filled with nuclear fuel pellets and also has at least one neutron moderator rod shifted toward one corner where a control rod is inserted, away from a cross sectional center of the fuel assembly.