Safety
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. To enter that the Hearing Aid Compatibility rating for your phone is maintained, secondary transmitters such as Bluetooth and WLAN(this phone does not have WLAN) components must be disabled during a call. See Page 91 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
HLAA (Hearing Loss Association of America)
http://www.hearingloss.org/learn/cellph
onetech.asp
The Hearing Aid Compatibility FCC Order
http://hraunfoss.fcc.gov/edocs_public/at
