Appendix 127FCC Notices (U.S. Only)Most Dell computers are classified by the Federal Communications Commission (FCC) as Class Bdigital devices. To determine which classification applies to your computer, examine all FCCregistration labels located on the bottom, side, or back panel of your computer, on card-mountingbrackets, and on the cards themselves. If any one of the labels carries a Class A rating, your entirecomputer is considered to be a Class A digital device. If all labels carry an FCC Class B rating asdistinguished by either an FCC ID number or the FCC logo, ( ), your computer is considered tobe a Class B digital device.Once you have determined your computer’s FCC classification, read the appropriate FCC notice.Note that FCC regulations provide that changes or modifications not expressly approved by Dellcould void your authority to operate this equipment.This device complies with Part 15 of the FCC Rules. Operation is subject to the following twoconditions:• This device may not cause harmful interference.• This device must accept any interference received, including interference that may causeundesired operation.Class AThis equipment has been tested and found to comply with the limits for a Class A digital devicepursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protectionagainst harmful interference when the equipment is operated in a commercial environment. Thisequipment generates, uses, and can radiate radio frequency energy and, if not installed and used inaccordance with the manufacturer’s instruction manual, may cause harmful interference with radiocommunications. Operation of this equipment in a residential area is likely to cause harmfulinterference, in which case you will be required to correct the interference at your own expense.Class BThis equipment has been tested and found to comply with the limits for a Class B digital devicepursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protectionagainst harmful interference in a residential installation. This equipment generates, uses, and canradiate radio frequency energy and, if not installed and used in accordance with the manufacturer’sinstruction manual, may cause interference with radio communications. However, there is noguarantee that interference will not occur in a particular installation. If this equipment does causeharmful interference to radio or television reception, which can be determined by turning theequipment off and on, you are encouraged to try to correct the interference by one or more of thefollowing measures:• Reorient or relocate the receiving antenna.• Increase the separation between the equipment and the receiver.