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A program to communicate with TTY/TDD devices CallTTY TDD software 2.35 A program to communicate with phone TTY/TDD devices (Telecommunications Devices for the Deaf) via a sound card, without TTY modem. A simple interface between sound card and phone line or acoustic connection with phone handset are used.Together with "Virtual Audio Cable" software CallTTY can work via Skype Internet-phone, without additional hardware at all.




HAM radio digital communications  software. TrueTTY 2.75 A program for amateur radio digital communications via a sound card. Supported modes are RTTY (Baudot code), ASCII (7 or 8 bits), PSK31, BPSK63, BPSK125, AMTOR-FEC (SITOR-B, NAVTEX), MFSK16, MFSK8. HF-PACKET and UHF-PACKET (AX25) are supported in KISS-TNC emulation mode. SELFEC SITOR, AMTOR-ARQ (SITOR-A) and DTMF-code decoding is also possible. No additional hardware is required. You only need a transceiver and computer with a sound card.

Radio technician. I like something new such as True TTY, I already tried this program to my friend use VHF radio (145. 020 Mhz), and result good and friendly to use it. I rare to use it bacause I no spare time to communicate with my friend. I just to tray. My friend station is 300 meter from my station.



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