User's Manual

Table Of Contents
33
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. This methodology applies equally for T ratings.
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:
https://fjallfoss.fcc.gov/oetcf/eas/reports/GenericSearch.cfm
Your device meets the M4/T4 level rating.