User's Manual

196
Safety
Teletypewriter (TTY) Devices
You can use an optional teletypewriter (TTY) device with your phone
to send and receive calls. You must plug the TTY device into the
phone’s headset connector and set the phone to operate in one of
three TTY modes.
A TTY is a communication device used by people who are hard of
hearing or have a speech impairment. TTY does not work from mobile
phone to mobile phone. Use a TSB-121 compliant cable (provided
by the TTY manufacturer) to connect the TTY device to your phone.
Your phone has a 2.5mm jack. Set the phone to Medium volume level
for proper operation. If you experience a high number of incorrect
characters, adjust the volume as needed to minimize the error rate.
For optimal performance, your phone should be at least 12 inches (30
centimeters) from the TTY device. Placing the phone too close to the
TTY device may cause high error rates.
Avoid potential hearing loss.
Prolonged exposure to loud sounds (including music) is the most
common cause of preventable hearing loss. Some scientific research
suggests that using portable audio devices, such as portable music
players and cellular telephones, at high volume settings for long
durations may lead to permanent noise-induced hearing loss. This
includes the use of headphones (including headsets, earbuds and
Bluetooth or other wireless devices). Exposure to very loud sound
has also been associated in some studies with tinnitus (a ringing in
the ear), hypersensitivity to sound and distorted hearing. Individual
susceptibility to noise-induced hearing loss and other potential
hearing problems varies.
The amount of sound produced by a portable audio device varies
depending on the nature of the sound, the device, the device settings
and the headphones. You should follow some common sense
I
I