APPENDIX xv6700, User Manual, Page: 150 / 160

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Appendix
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 above example, 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 is
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.
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
Self Help for Hard of Hearing People Inc. [SHHH]
www.hearingloss.org/hat/TipsWirelessPhones.htm
The Hearing Aid Compatibility FCC Order:
http://hraunfoss.fcc.org/edocs_public/attachmatch/FCC-03-168A1.pdf