Operating system name and version: Centos 6.5
Version of smsd: 3-3.1.15
Smsd installed from: sources
Name and model of a modem / phone: Ctrion MC37i
Interface: USB via USB hub

Following in my configuration

im moving sms file to queue directories using a java application . everything working fine but the speed I could achieve is 2 message per modem when Im using 32 modems at once . It takes 26 second to move file to sent. how can I reduce this duration