LG VX5200 User Manual page 42

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.
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