To optimise your CommzGate for high SMS sending throughput, follow the steps below:
1) Login as as admin and go to 'Configure>System and Modems'
2) Set 'Send/Receive Ratio' to '90% Send, 10% Receive' . (see screenshot)
3) Set 'Polling Interval' to '5sec' . (see screenshot)
4) Set 'Modem respond time-out' to '3sec' . (see screenshot)
Restart the Worker process. You should now achieve throughput of around 8 SMS per minute per modem.