User's Manual

The wireless telephone industry has developed a rating system for wireless
phones, to assist hearing device users find phones that may be compatible
with their hearing devices. Not all phones have been rated. Phones that
are rated have the rating on their box or a label located on the box.
The ratings are not guarantees. Results will vary depending on the user’s
hearing device and hearing loss. If your hearing device happens to be
vulnerable to interference, you may not be able to use a rated phone
successfully. Trying out the phone with your hearing device is the best way
to evaluate it for your personal needs.
• M-Ratings
: Phones rated M3 or M4 meet FCC requirements and are
likely to generate less interference to hearing devices than phones that
are not labeled. M4 is the better/higher of the two ratings.
• T-Ratings
: Phones rated T3 or T4 meet FCC requirements and are
likely to generate less interference to hearing devices than phones that
are not labeled. T4 is the better/higher of the two ratings.
Hearing devices may also be rated. Your hearing device manufacturer or
hearing health professional may help you find this rating. Higher ratings
mean that the hearing device is relatively immune to interference noise.
The hearing aid and wireless phone rating values are then added together.
A sum of 5 is considered acceptable for normal use. A sum of 6 is
considered for best use.
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 is synonymous for T ratings. 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.
To ensure that the Hearing Aid Compatibility rating for your phone is
maintained, secondary transmitters such as Bluetooth and WLAN
components must be disabled during a call. See Page XX for instructions to
disable these components.