We are facing 3G download and upload speed issue in our Custom board.Below is the Environment setup,
Processor : AM3354
Linux Kernel : 3.12
TI SDK Version : 7
3G Modem : Ublox Lisa U230
Browser : QT Browser
Interface : USB High speed port
We are connected the 3G modem into custom board USB host port and got the CDC-ACM devices (ttyACM0 to ttyACM7) in /dev folder. Have ran the pppd (V2.4.7) and connection was successful.We open "www.bandwidthplace.com" site with QT browser (fancybrower) and tested the upload and download speed all the time we got below speed only
Download speed : less than 0.4 Mbit/s
Upload speed : 0.1 Mbit/s
If I connect the same 3G modem into Ubuntu(with pppd) or Windows 7 machine getting higher speed about 5 Mbit/s(download) consistently.
Below are my questions,
1) Is USB port working very slowly or problem with Browser?
2) Is there problem with cdc-acm driver?
Please help on this