The Gateway ID is a unique number Voicent Gateway uses to control its license usage.
You can get this number on Voicent Gateway main window.
(Note to resellers: you must get the gateway ID from your customers computer)

The Voicent Gateway ID is a unique number generated based on information about your computer, such as the network card address (MAC address) and other hardware and software factors. A Voicent license file contains a gateway ID and can be installed only on the computer that has the same gateway ID. For more information about Voicent licensing scheme, such as to have the ability to move the software to another computer, please see License FAQ.