3G / 3G dongle backup for router

Hi Experts,

I am looking at purchasing a draytek router which will have a USB backup with either a 3G or 4G dongle in it so if the line goes down as a business we can still operate.

however my question is as following:

We have two ISDN30 lines and high call and data useage. are the dongles going to be up to the job or not?

can you get high bandwidth ones? the company of 60 users is all internet based (RDP, VNC, Website development, internet quoting / products'

Best Regards,

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Draytek will work, as well as Fritz!box ones. Please note, try to get a working combo (check the USB compatible dongle list, as well as asking your mobile/data/network provider if it's going to work)

This solution is for DATA ONLY! If the ISDN30 line fails, calls will not forward to this USB data dongle solution. The Fritz!box HAS phone connections, but those are meant for the VOIP lines INCLUDED in your ADSL line already. Then let the phone company forward the ISDN30 numbers to this number. All calls has to go through only one or two phones.

The bandwidth depends on router compatibility AND your coverage in the area you are at. If you have towers that are either far, or a tower that's been overly used by others, even though your dongle and subscription is high speed, you might still get only low speeds. There are so many factors to consider.
One way of a quick test before you implement this, is to a phone with data subscription from the network provider you're planning on using. The phone has to be 4G/LTE, as well as the data subscription. Then have the phone do speedtest during the day, and for a longer period. If it's reliable, the 4G/LTE dongle you want to get combined with the data subscription for that same network/data provider will probably be just as reliable as the tests you performed during the week.

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