Arris Touchstone CM820B Specification
Operating Temperature °F (°C) – 32 to 104 (0 to 40)
Operating Relative Humidity (Min-Max) – 5-95% (non-condensing)
Storage Temperature °F (°C) – -40 to 158 (-40 to 70)
Dimensions (H x W x D) in. (cm) – 6.2 x 1.7 x 5.7 (16.3 x 5.3 x 14.5)
Weight lbs (kg) – 0.81 (0.37)
Diagnostic LEDs – Power, DS, US, Online, Link

Interfaces
RF Interface – External 75Ω ‘F’ type connector
Data Interface – 10/100/1000 Base-T Ethernet RJ-45
Input Voltage (nominal) – 115-240 VAC 50/60 Hz (A, B, S models)
100 VAC 50/60 Hz (C model)
Power On/Off Switch – Yes (S model)
Power Consumption (W) – 5 (idle), 5.5 (max.) (A, B, S models) 6 (idle), 6.5 (max.) (C model)

Arris Touchstone CM820B DOCSIS 3.0 8×4 Ultra-High Speed Cable Modem CM820
● DOCSIS® / EuroDOCSIS® 3.0 Compliant and backward compatible
● Integrated Universal Power Supply for high reliability
● Flexible DSxUS channel bonding configuration support (up to 8×4)
● Multi-colored LEDs for rapid troubleshooting on installation
● Dual, independent 96MHz Tuners with receive range up to 1 GHz
● Dual-Mode operation on the CM820B and CM820S models