System and method for recording communication sessions in a peer-to-peer communication networks. A correction unit is configured to correct for non-uniformity of static magnetic field caused during the dynamic scanning, depending upon the phase difference. The invention further relates to corn seeds and plants produced by crossing plants of variety CV719396 with plants of another variety, such as another inbred line. The test apparatus includes an optical receiver to receive optical signals from a transmitter coupled to the transmitter source.