The vertical red lines in this window show the working frequencies of the receiving filters. In the top window the current spectrum of a signal (blue line) and a peak detector of spectral components (green line) are shown. The working area of the program is divided into several windows, the sizes of which can be changed by the user by dragging the borders.
PHONE KEYPAD SOUND SIMULATOR SOFTWARE
Third-party software Virtual Audio Cable (VAC) is necessary for using CallTTY with Skype.ĬallTTY users can purchase VAC with 25% discount (for $22.50) using URL and password from CallTTY documentation.Īfter installing CallTTY, VAC and Skype you need set up them to work together as described in CallTTY help-file. In this case no additional hardware is necessary at all.
If there are several sound cards in a computer, you can select the card by the " Setup / Interface / Use sound card" option.ĬallTTY can be used to communicate with phone TTY devices via SkypeOut (for outgoing calls) or SkypeIn (for incoming calls) Internet-phone service. The choice of a signal source (line in or microphone input) and record and output levels are made by the OS ("Volume control" in the system tray). To avoid law violation you can use speaker and microphone mechanically connected to phone handset (see below). The example of simplest schematics for connecting sound card to phone line is shown below.īut take to attention that connecting home-made devices to phone line may be prohibited by law in your country. Together with " Virtual Audio Cable" software CallTTY can work via Skype Internet-phone, A simple interface between soundĬard and phone line or acoustic connection with phone handset are used. Simple software to handle devices connected to LPT portĪ program to communicate with phone TTY/TDD devices (Telecommunications Devices for the Deaf) A tool for monitoring popular web-cluster service from OH9W/OH2AQ Radio Club
A program to communicate with phone TTY/TDD devices via a sound card or via Skype Internet-phoneĬluster monitor.
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