Twilio is currently the only service that can be use for the BYOS SMS/text feature.
Once you sign up for a Twilio account, login and find Messaging menu, select Services menu item, then click the Create Messaging Service button. The following figure shows the relavant information.
You can find the webhook information from your Voicent account. It is under the My Account, BYOS Setup page.
To send a test message, select the twilio Messaging menu, then select Send an SMS menu item. If the test fails, you can open a Twilio support ticket for help. Make sure you can send a text message using the newly created messaging service before continuing to the next step.
To start, login to your Voicent Cloud Account and on the left menu select BYOS Setup. From the page, Click the Add Text Service button. If you do not see the BYOS menu item, please open a support ticket asking for enabling the BYOS option for your account.