LG MS659 Quick Reference Manual page 92

Safety
90
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) or WLAN mode off for HAC.
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