Subscription mode systems can use text-to-speech (TTS) generated prompts for a range of features. TTS is supported in a number of languages and with various voice choices, as shown in the table below.

Whenever the settings for a TTS prompt are changed, the next time the prompt is requested, including preview through the web administration menus, the resulting prompt is cached by the system as a local file. This removes the initial delay that can occur the first time a TTS prompt is played.