In-band transmission of TTY/TTD signals for systems...

Details In-band transmission of TTY/TTD signals for systems... In-band transmission of TTY/TTD signals for systems...

2005-11-01

2005-11-01

Nguyen, Steven (Department: 2665)

Multiplex communications

Low speed asynchronous data system

C370S300000, C379S052000

Reexamination Certificate

active

06961320

ABSTRACT:
A method, system, and software product for transmitting TTY/TDD signals in a system employing low bit-rate voice compression are disclosed. The method includes receiving an input signal and generating a teletypewriter (TTY) indicator signal from the input signal. Whether or not the input signal is a TTY signal including a TTY character, is determined based on the TTY indicator signal. A TTY packet including the TTY character of the TTY signal is constructed and transmitted if the input signal is determined to be a TTY signal. A method, system, and software product for receiving and decoding TTY/TDD signal is also disclosed.

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