rating and measurement procedure are described in the American National Standards Institute (ANSI) C63.19 standard.

To enter that the Hearing Aid Compatibility rating for your

phone is maintained, secondary transmitters such as Bluetooth and WLAN components must be disabled during a call. See Page 52 for instructions to disable these components.

For information about hearing aids and digital wireless phones

FCC Hearing Aid Compatibility and Volume Control http://www.fcc.gov/cgb/dro/hearing.html

Gallaudet University, RERC http://tap.Gallaudet.edu/DigWireless.KS/DigWireless.htm

Hearing Loss Association of America [HLAA] http://www.hearingloss.org/learn/cellphonetech.asp

The Hearing Aid Compatibility FCC Order http://hraunfoss.fcc.gov/edocs_public/attachmatch/FCC-03- 168A1.pdf

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LG Electronics 221C manual