PPP connection using Mobile broadband with Huawei 4G 3372h modem

[daveck]

Hello all.

I have a question - I am not a business user - I just have a fairly fancy home setup. I use a Draytek 2862

router for internet access over VDSL. I today purchased a Huawei 4G 3372h 4G modem from O2 that let's

me set this up as a failover connection in case my primary VDSL service goes down. All works like a charm.

The only issue I have is that I am connecting using the "DHCP Client" mode on the modem. What I'd really

like to do is connect using PPP so the 4G connection gets a public IP address (dynamic is okay). This would

mean my Dynamic DNS set-up could still allow VPN connectivity from my home to relatives homes. The

downside of using DHCP Client mode is that there is no public IP address accessible for the link. Has

anyone tried to use a 4G modem in this PPP mode over O2 ? Is it a supported mode of access ? I've tried

using various settings for the Modem Initial String etc. but to no avail ... 

Many thanks for any pointers !

[MI5 · Accepted solution]

Looks like it's variant dependent and requires a bit of fiddling.....
http://www.0xf8.org/2017/01/flashing-a-huawei-e3372h-4g-lte-stick-from-hilink-to-stick-mode/

[daveck]

MI5 - thank you thank you !

I did some digging on the h vs s variance and couldn't find much info - so you have helped me greatly

on that score with this link. This is invaluable info and you are right - it does look a bit involved - but does

explain what is going on and why PPP mode with the h variant is not happy.

Much obliged to you !

[MI5]

No problem at all mate and good luck with it