Controls

Dialed

Displays the most recently dialed digits and other characters.

Number and character keypad

Buttons you can use to dial the numbers and characters for transmission.

Mutes the audio output.

Level

Controls the output tone level.

Delta

Boosts the high-frequency portion of the output signal.

Designed to compensate for the attenuation of higher frequencies by some telephone lines.

Pattern n

The string pattern to be sent as tones.

Tip: The digits A, B, C and D can be used to secure command sequences, as they are not present on standard phones – only military phones and certain custom dialing devices.

Button

Click to send the corresponding pattern.