Adtran TSU 120 (2nd Gen). Storage temperature range (T-T): -20 - 70 °C, Operating temperature range (T-T): 0 - 45 °C. Dimensions (WxDxH): 215.9 x 317.5 x 79.37 mm, Weight: 1814.37 g. Networking features: 10BaseT. Minimum system requirements: 15 VAC, 9 watts RJ-48C V.35"Y". Cabling technology: 8-pin_modular