LG Electronics USA Inc. AS680 Manual De Usuario

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Safety
M-Ratings: Phones rated M3 or M4 meet FCC requirements and are likely 
to generate less interference to hearing devices than phones that are not 
labeled. M4 is the better/higher of the two ratings.
Hearing devices may also be rated. Your hearing device manufacturer or 
hearing health professional may help you find this rating. Higher ratings 
mean that the hearing device is relatively immune to interference noise. 
The hearing aid and wireless phone rating values are then added together. A 
sum of 5 is considered acceptable for normal use. A sum of 6 is considered 
for best use.
In the example to the left, if a hearing aid meets the M2 level 
rating and the wireless phone meets the M3 level rating, the 
sum of the two values equal M5. This should provide the 
hearing aid user with “normal usage” while using their 
hearing aid with the particular wireless phone. “Normal usage” in this 
context is defined as a signal quality that’s acceptable for normal  operation.
The M mark is intended to be synonymous with the U mark. The T mark 
is intended to be synonymous with the UT mark. The M and T marks are 
recommended by the Alliance for Telecommunications Industries Solutions 
(ATIS). The U and UT marks are referenced in Section 20.19 of the FCC 
Rules. The HAC rating and measurement procedure are described in the 
American National Standards Institute (ANSI) C63.19 standard.
When you’re talking on a cell phone, it’s recommended that you turn the BT 
(Bluetooth) mode off for HAC.
According to HAC policy (KDB 285076), we state this handset has not been 
rated for hearing aid compatibility with respect to the Wi-Fi capability.
For information about hearing aids and digital wireless phones
Wireless Phones and Hearing Aid Accessibility
http://www.accesswireless.org/Home.aspx
FCC Hearing Aid Compatibility and Volume Control
http://www.fcc.gov/cgb/consumerfacts/hac_wireless.html