Modem Fastrack M1306 has two kind, first without Embedded IP Stack and secondly with Embedded IP Stack and they are diffrence in price. I just want to know what is/are the other diffrence and what is/are the use(s) of modem Embedded IP Stack? Could someone explained in detail. Thank’s. 
Hello,
The embedded IP stack version ships with an IP program installed on the module. You can make TCP/UDP/FTP/email/ping connections with that. The stack is controlled with “AT#” commands.
Best Regards,
Tom