As a suggestion ... what is the best gateway for:
- Use Multiple Modem
- Edit waiting time between messages. Ex: 10-second server usage interval between messages.
- set modem1 to userX, modem2 to userY, modem3 to userZ
- Set random sends for modem. ex. I have to send 10 messages in sequence and I have 2 modems. Message 1,3,5,7,9 is for modem1 and message 2,4,6,8,10 is for modem 2.