Zhone 1740-A3-400. DSL connection type: ADSL. Certification: FCC Part 16 and 68 UL CE. Input current: 1 A. Operating temperature range (T-T): 0 - 40 °C, Storage temperature range (T-T): -20 - 70 °C. Dimensions (WxDxH): 185.9 x 127.9 x 29.9 mm, Connectivity technology: Wired, Input frequency: 50/60 Hz