Samsung Eternity II SGH-A597 - Manual (Page 165)

Accessibility 160
Section 19: Accessibility
TTY Settings
TTY (also known as a TDD or Text Telephone) is a
telecommunications device that allows people who are deaf or
hard of hearing, or who have speech or language disabilities, to
communicate via a telephone. This phone comes TTY-ready and
only requires the insertion of the TTY device to enable this
feature.
Use the following steps to access the TTY settings:
ᮣ Inserting a TTY connector into the Headset/Adapter jack (on
the top of the phone) enables this function.
For additional technical support you may access the following
website or call 1-888-987-4357.
http://www.samsungtelecom.com/contact_us/accessibility.asp