On Premise Software Help Resource : Help TopicsSetup SMS Service

To enable texting with Voicent, you will need an SMS modem with a working SIM card

To set up SMS, click Setup > SMS Setup Wizard . The program will prompt you to enable auto-detect or not. In most cases, you should allow auto detect to find your modem. Otherwise you will have to specify a COM port for the program to listen on using the Setup Wizard