I've done the same with RB751 units at a few sites which has worked well. Another option is to get something like an RB750 which is connected direct to mains power, and if that drops (assuming the rest of your gear is up) you will know that the mains has failed. -----Original Message----- From: Public [mailto:public-bounces@talk.mikrotik.com.au] On Behalf Of Paul Julian Sent: Monday, 31 August 2015 5:54 PM To: public@talk.mikrotik.com.au Subject: [MT-AU Public] 3G/4G on mAP2n or hAP-2nD Hi guys, just wondering if anybody has used the Routerboard mAP2n with a USB dongle for 3G/4G access ? We are looking at some out of band options for some remote sites and also a way to identify if there has been a power problem on site, so thinking that these things are pretty cheap and we can configure them as an out of band router which plugs into the mains power rather than UPS, that way if we see it drop we know we are running on UPS and if our other gear fails for any reason we can get in remotely using the unit as long as the mains power is working. The other option I am considering is the hAP-2nD which has the advantage of additional ports which I can connect to different devices on site if need be. Both units are the same price. Any thoughts ?? Regards Paul