BlackBerry RAR20CN BLACKBERRY WIRELESS 7250 WIRELESS HANDHELD User Manual
BlackBerry Limited BLACKBERRY WIRELESS 7250 WIRELESS HANDHELD
Contents
USER MANUAL
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Published in XXXXX.
PRINTSPEC-008
MAT-09911-001
US Information Concerning the Federal Communications Commission ("FCC")
Requirements for Hearing Aid Compatibility with Wireless Devices
Background Information
When wireless devices are used near hearing devices (such as hearing aids and cochlear implants), users
may detect a buzzing, humming, or whining noise. Some hearing devices are more immune than others
to this interference, and wireless devices also vary in the amount of interference they generate.
The wireless telephone industry has developed ratings to assist hearing device users in finding wireless
devices that may be compatible with their hearing devices. Not all wireless devices have been rated.
Wireless devices that are rated will have the rating displayed on their box together with other relevant
approval markings.
The ratings are not guarantees. Results will vary depending on the user's hearing device and hearing
loss. If your hearing device is vulnerable to interference you may not be able to use a rated wireless
device successfully.
Consulting with your hearing health professional and testing the wireless device with your hearing
device is the best way to evaluate it for your personal needs.
How the Ratings Work
M-Ratings: Wireless devices rated M3 or M4 meet FCC requirements and are likely to generate less
interference to hearing devices than wireless devices that are not labeled. M4 is the better/higher of
the two ratings.
T-Ratings: Wireless devices rated T3 or T4 meet FCC requirements and are likely to be more usable with
a hearing device's telecoil ("T Switch" or "Telephone Switch") than unrated wireless devices. T4 is the
better/higher of the two ratings. (Note that not all hearing devices have telecoils in them).
Hearing devices may also be measured for immunity to this type of interference. Your hearing device
manufacturer or hearing health professional may help you find results for your hearing device. The
more immune your hearing aid is, the less likely you are to experience interference noise from wireless
devices.
For additional information about the FCC's actions with regard to hearing aid compatible wireless
devices and other steps the FCC has taken to ensure that individuals with disabilities have access to
telecommunications services, please go to: www.fcc.gov/cgb/dro.