AT&T WF721 IP Phone User Manual

28 Troubleshooting Troubleshooting 29
Radio Frequency (RF) Energy
This device meets the government’s requirements for
exposure to radio waves.
This device is designed and manufactured not to exceed the
emission limits for exposure to radio frequency (RF) energy
set by the Federal Communications Commission of the U.S.
The exposure standard for wireless mobile devices employs a
unit of measurement known as the Specific Absorption Rate,
or SAR. The SAR limit set by the FCC is 1.6 W/kg.*
While there may be differences between the SAR levels of
various devices and at various positions, they all meet the
government requirement.
The FCC has granted an Equipment Authorization for this
device with all reported SAR levels evaluated as in compliance
with the FCC RF exposure guidelines. SAR information on
this device is on file with the FCC and can be found under the
Display Grant section of
after searching FCC ID: SRQ-WF721.
* Tests for SAR are conducted using standard operating positions
accepted by the FCC with the device transmitting at its highest
certified power level in all tested frequency bands. Although the SAR
is determined at the highest certified power level, the actual SAR level
of the device while operating can be well below the maximum value.
This is because the device is designed to operate at multiple power
levels so as to use only the power required to reach the network. In
general, the closer you are to a wireless base station antenna, the
lower the power output.
FCC Compliance
This device complies with part 15 of the FCC Rules. Operation
is subject to the condition that this device does not cause
harmful interference.
Changes or modifications not expressly approved
by the manufacturer could void the user’s authority to
operate the equipment.
This equipment has been tested and found to comply
with the limits for a Class B digital device, pursuant to part
15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference in a
residential installation. This equipment generates, uses,
and can radiate radio frequency energy and, if not installed
and used in accordance with the instructions, may cause
harmful interference to radio communications. However,
there is no guarantee that interference will not occur in a
particular installation. If this equipment does cause harmful
interference to radio or television reception, which can be
determined by turning the equipment off and on, the user is
encouraged to try to correct the interference by one or more
of the following measures:
•   Reorient or relocate the receiving antenna.
•   Increase the separation between the equipment 
and receiver.
•   Connect the equipment into an outlet on a circuit 
different from that to which the receiver is connected.
•   Consult the dealer or an experienced radio/TV 
technician for help.