Casio C731 User Guide - Page 186

Safety How will I know if my hearing aid will work with a particular digital wireless phone? You'll want to try a number of wireless phones so that you can decide which works the best with your hearing aids. You may also want to talk with your hearing aid professional about the extent to which your hearing aids are immune to interference, if they have wireless phone shielding, and whether your hearing aid has a HAC rating. For more information about hearing aids and digital wireless phones: • FCC Hearing Aid Compatibility and Volume Control http://www.fcc.gov/cgb/dro/hearing.html • Hearing Loss Association of America http://www.hearingloss.org/learn/cellphonetech.asp • CTIA http://www.accesswireless.org/hearingaid/ • Gallaudet University, RERC http://tap.gallaudet.edu/voice I 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 185