4G/GSM ethernet bridge

[golserma]

Currently I have two internet connections in the office. One is over a wireless provider and one is over ADSL both are connected using ethernet briges (ppoe) to the pfsense firewall. We are cancelling the ADSL service and now I'm looking for a decent 4g/GSM ethernet bridge for emergency connections (voip and POS devices). I'd like to have a bridge and not a router since I'd like to have the wan IP directly on the firewall and no double NAT.

Any hardware considerations? I have found hundreds of USB devices but I'm now sure I should trust them to be reliable. My pfsense runs on an ALIX board from pc engines.

[Johny_Johnson]

@golserma I didnt even ever heard about it