The Sierra Wireless MC series uses the PAD commands to open a UDP/IP or TCP/IP socket. Only one of these PAD sessions can be open at any one time. As far as I can tell this means you cannot use it to connect and upload files to an FTP server as you need to have two sockets (same IP address different ports) open at once (control and data channels).
Is there a way to do this (have two ports open) on the MC8795V or is there another Sierra modem module (with openAT commands?) that can have multiple sockets open at any one time??