Operating system name and version: Ubuntu 16.04
Version of smsd: 3.1.21
Smsd installed from: sources
Name and model of a modem / phone: D-Link DWM-157
Interface: serial USB

Hi there. I am using smstools3 for sending SMS and USSD codes. It is working well. But I want to speed up sending the SMSs. Now it takes an average of 2 seconds to send one sms. As a test, I filled the sms queue with 4 SMSs. It took 8 seconds to send all the SMSs. I want to send a SMS within 1 second or even less by using smstools3. Is there anyway to reach this speed in smstools?
Moreover, does inactive the SMS receive, increase the rate of sending? If yes, how can I configure it in smstools?
Thanks in advanced.