LG VX5600 Guia Del Usuario página 123

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's acceptable for normal
operation.
The M mark is intended to be
synonymous with the U mark. The T
For information about hearing aids and digital wireless phones
Wireless Phones and Hearing Aid Accessibility
http://www.accesswireless.org/hearingaid/
FCC Hearing Aid Compatibility and Volume Control
http://www.fcc.gov/cgb/consumerf acts/hac_wireless.html
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 over the cell
phone, it's recommended you'd
turn the BT (Bluetooth) mode off
for HAC.
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