The Gateway supports a number USB GSM, and these can provide both voice and SMS facilities
In order to use the USB for voice calls, you may have to unlock the required ‘audio’ feature. We have found dc-unlocker to be the lowest cost most reliable tool for this.
|E1550||Y||Y||Do not use firmware version 11.608.12.10.209|
Please note the above list is provided in good faith but is for guidance only, please conduct your own testing before deploying a production system.