About this guide Model 4520 & 4110 Series Getting Started Guide8PrecautionsNotes and cautions, which have the following meanings, are used throughout this guide to help you becomeaware of potential Router problems. Warnings relate to personal injury issues, and Cautions refer to potentialproperty damage.Note Calls attention to important information.Safety when working with electricityThe shock hazard symbol and WARNING heading indicate a potential electricshock hazard. Strictly follow the warning instructions to avoid injury causedby electric shock.The alert symbol and WARNING heading indicate a potential safety hazard.Strictly follow the warning instructions to avoid personal injury.The shock hazard symbol and CAUTION heading indicate apotential electric shock hazard. Strictly follow the instructions toavoid property damage caused by electric shock.The alert symbol and CAUTION heading indicate a potential haz-ard. Strictly follow the instructions to avoid property damage.The SmartNode contains no user serviceable parts. The equipment shall bereturned to Patton Electronics for repairs, or repaired by qualified service per-sonnel.Mains Voltage: Do not open the case when the power cord is connected. Forsystems without a power switch, line voltages are present within the powersupply when the power cord is connected. The mains outlet that is utilized topower the SmartNode router shall be within 10 feet (3 meters) of the device,shall be easily accessible, and protected by a circuit breaker.For AC powered units, ensure that the power cable used meets all applicablestandards for the country in which it is to be installed, and that it is connectedto a wall outlet which has earth ground.