nope it is surely not a pattern, sometime it take 1-1.5hrs and then disconnects.here are the line stats with my parallel line disconnectedSNR Margin 15.6, 6.0 dbLine Attenuation 17.1, 13.7 dbData Rate 2560, 692 kbps Attainable Rate: 11276, 692 kbpsOut Power: 13.6, 11.3 dbm