Licensing

As the exclusive licensor of Asterisk, Digium offers the option of licensing its software under attractive commercial terms. As its popularity and reputation grows, Asterisk continues to find applications in a wide variety of telecommunications systems and appliances that need PBX, Voice over IP, and other telephony capabilities.

Developers have discovered that they can quickly create exciting new products by integrating their own software with Asterisk and related Digium telephony software. Most Digium software is licensed under the GNU-GPLV2

Cost of a Commercial License

The license fees are very reasonable, and offer t]remendous value for the capabilities they deliver. The exact license fees vary depending on factors such as the software applications, the number of simultaneous channels used, and the quantity purchased. License customers also receive internal software documentation and access to Digium's expert support and development resources

Cepstral Test-to-Speech


Enable your Asterisk installation to read any phrase or text using the voice of Asterisk - Allison Smith. With Cepstral's Text-to-Speech technology, Allison's voice can be used with Asterisk to read IVR prompts, informational messages, email, or any other English language text phrases or files.

To use the Allison text-to-speech voice, you need two components:
  1. A license for the Allison voice text-to-speech engine
  2. A "concurrency license" for each simultaneous port (channel) required
Please Contact Us for additional information