Loading [a11y]/accessibility-menu.js
KEYPAC - A Telephone Aid for the Deaf | IEEE Journals & Magazine | IEEE Xplore

KEYPAC - A Telephone Aid for the Deaf


Abstract:

This paper presents a telecommunications system, KEYPAC (Key Phone Alphanumeric Communication), that enables a user to communicate over the telephone without the use of s...Show More

Abstract:

This paper presents a telecommunications system, KEYPAC (Key Phone Alphanumeric Communication), that enables a user to communicate over the telephone without the use of speech. The design of this system was motivated by the need for a low cost, yet simple and useful means of telephone communication in the deaf community. The KEYPAC system provides a flexible means for speechless telephone communication by utilizing an ordinary pushbutton telephone as a transmitting device. Alphanumeric messages are sent by pressing sequences of keys according to a simple coding scheme of two keys per letter and one key per number (0-9). Message reception is accomplished with the use of a small, hand-held receiver that is attached to the telephone. The receiver decodes sequences of D.T.M.F. (Dual Tone Multi Frequency) audio tones and displays the resulting messages on a visual display or hard copy printer.
Published in: IEEE Transactions on Communications ( Volume: 27, Issue: 9, September 1979)
Page(s): 1366 - 1371
Date of Publication: 30 September 1979

ISSN Information:


Contact IEEE to Subscribe

References

References is not available for this document.