Cygwin run in testing machine with Windows 7 x86 Enterprise:
ver. 3.1.15:
Ecotel ISDN2-240SB GSM Gateway:
Interface: accessed over LAN, also accessed via USB serial port converter

Dear friends,
I am running the SMStools3 for a week and testing with my GSM Gateway and it works fine. GSM Gateway supports 4 sim cards but when I used SMStools to send a message it is always sent via first sim card.

Here is my question:
So may I config smsd to send message with any of the other sim cards? Something like load balancing or the perfect scenario is when sending messages to a mobile operator then use the sim card of the same mobile operator, as we have 3 mobile operators in the area.

Thanks in advanced!
Regards to all!

SMSTools3 needs individual port for each modem/SIM. I do not know about that Ecotel device, but usually those kind of devices do not provide individual ports. Extended command set for selecting SIM while using single port is not supported.

Hello and thank you for your reply!
It is a single port device in deed.

Thanks!