If you wish to send and receive messages via the shared pool of numbers
Click Tools > Settings > Under SMPP > Use the shared numbers > On
If you are sending messages and receiving replies via a dedicated number
- Ensure that your dedicated number is being used as your Sender ID
- Configure your dedicated number to return messages over SMPP, by clicking Tools > Dedicated Numbers > Click Settings next to the number you wish to edit
- Ensure that the number is set up to receive replies over SMPP, and click Save Settings at the bottom of the page.