Page 1-14 Xerox Document Centre 440/432/430/426/425/420 User Guideequipment, or equipment malfunctions, may give thetelecommunications company cause to request the user todisconnect the equipment.Users should ensure for their own protection the electricalground connections of the power utility, telephone lines andinternal metallic water pipe system, if present, are connectedtogether. This precaution may be particularly important in ruralareas.CAUTION: Users should not attempt to make suchconnections themselves, but should contact theappropriate electric inspection authority or electrician, asappropriate.Notice: The Ringer Equivalence Number (REN) assigned toeach terminal device provides an indication of the maximumnumber of terminals allowed to be connected to a telephoneinterface. The termination on an interface may consist of anycombination of devices subject only to the requirement that thesum of the Ringer Equivalence Numbers of all the devicesdoes not exceed 5.Laser SafetyThis product complies with safety standards and is certified asa Class 1 Laser product under the US Department of Healthand Human Services (DHSS) Radiation PerformanceStandard according to the Radiation Control for Health andSafety Act of 1968. This product does not emit hazardous laserradiation.CAUTION: Use of controls or adjustments or performanceof procedures other than those specified herein mayresult in hazardous exposure of laser light.Since radiation emitted inside this product is completelyconfined within the protective housing and external covers, thelaser beam cannot escape from the machine during any phaseof the user operation.