i have problem with rapidly disconect of modesm, when used 4 modesm on hub.
when only ppp-out connect on one modem, (but 4 modems in hub) .. work ok
with two modem also, work, but not evry time.
but with 4 modems .. everothing go wrong ... repidly disconenct all time, on every 2-30 secund.
btw, I send supout file to sergejs
btw2, did you known, with hub , will be work ok (maybe, hub is not good) ... i try 3 hubs, all same
I came across this problem and it was the lack of external power on the usb hub.
Once I added an external power supply I managed to use 4 3G modems at the same time.
But I have a different issue now.
I use 2 fast modems (1mbit upload) and 2 slow (300kbit upload).
I have bonded the 2 fast into a one aggregated link and the other 2 into another aggregated link (using bonding with eoip tunnels)
The slow modems give aggregated traffic of about 600kbit (which is perfect since each modem give ~300kbit).
The fast modems though do not have the same results.
I can barely get 900kbit and each modem can give 1mbit upload.
All the settings are the same between both bonding interfaces and the eoip tunnels (both slow and fast modems are on the same router)