SMTX s758, User Manual, Page: 56 / 57

be synonymous with the UT mark.
The M and T marks are
recommended by the Alliance for
Telecommunications.
l 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.
l For information about hearing aids
and digital wireless phones.
l FCC Hearing Aid Compatibility and
Volume Control:
l
http://www.fcc.gov/cgb/dro/hearing.h
tml
l Gallaudet University, RERC:
l https://fjallfoss.fcc.gov/oetcf/eas/rep
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