Dell PowerConnect 2024 Manual de informações do sistema - Página 12
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Regulatory Notices
Electromagnetic Interference (EMI) is any signal or emission, radiated in free space or conducted along power or
signal leads, that endangers the functioning of a radio navigation or other safety service or seriously degrades,
obstructs, or repeatedly interrupts a licensed radio communications service. Radio communications services
include but are not limited to AM/FM commercial broadcast, television, cellular services, radar, air-traffic control,
pager, and Personal Communication Services (PCS). These licensed services, along with unintentional radiators
such as digital devices, including computer systems, contribute to the electromagnetic environment.
Electromagnetic Compatibility (EMC) is the ability of items of electronic equipment to function properly
together in the electronic environment. While this computer system has been designed and determined to be
compliant with regulatory agency limits for EMI, there is no guarantee that interference will not occur in a
particular installation. If this equipment does cause interference with radio communications services, which can be
determined by turning the equipment off and on, you are encouraged to try to correct the interference by one or
more of the following measures:
•
Reorient the receiving antenna.
•
Relocate the radio, TV, or other receiver away from the switch.
•
Plug the Ethernet switch into a different power outlet so that the switch and the receiver are on different
branch circuits.
If necessary, consult a Dell Technical Support representative or an experienced radio/television technician for
additional suggestions.
Dell computer systems are designed, tested, and classified for their intended electromagnetic environment. These
electromagnetic environment classifications generally refer to the following harmonized definitions:
•
Class A is typically for business or industrial environments.
•
Class B is typically for residential environments.
Information Technology Equipment (ITE), including peripherals, expansion cards, printers, input/output (I/O)
devices, monitors, and so on, that are integrated into or connected to the system should match the
electromagnetic environment classification of the computer system.
A Notice About Shielded Signal Cables: Use only shielded cables for connecting peripherals to any Dell device
to reduce the possibility of interference with radio communications services. Using shielded cables ensures that
you maintain the appropriate EMC classification for the intended environment. For parallel printers, a cable is
available from Dell. If you prefer, you can order a cable from Dell on the World Wide Web at
accessories.us.dell.com/sna/category.asp?category_id=4117.
Most Dell computer systems are classified for Class B environments. However, the inclusion of certain options can
change the rating of some configurations to Class A. To determine the electromagnetic classification for your
system or device, see the following sections specific for each regulatory agency. Each section provides country-
specific EMC/EMI or product safety information.
FCC Notices (U.S. Only)
Most Dell computer systems are classified by the Federal Communications Commission (FCC) as Class B digital
devices. To determine which classification applies to your computer system, examine all FCC registration labels
located on the bottom, side, or back panel of your computer, on card-mounting brackets, and on the cards
themselves. If any one of the labels carries a Class A rating, your entire system is considered to be a Class A digital
device. If all labels carry an FCC Class B rating as distinguished by either an FCC ID number or the FCC logo,
(
), your system is considered to be a Class B digital device.
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Unmanaged Switches System Infor mation Guide