We use the Draytek Vigor 130 modems extensively with clients in Australia that are either still on ADSL or have transitioned to NBN’s VDSL service.
There are two things important with the Draytek Vigor 130 that you need to get right.
Load the latest regional county version of firmware for your ISP
Configure the modem into Bridge Mode
If you have already put some settings into the Draytek then we recommend that you factory reset the unit when you do the firmware upgrade and then start again, there are only a few screens you need to change things in, these are screenshots from a system running ADSL (due to be upgraded in a few months) where the default IP has been changed. (Note: the default IP for the Draytek is 192.168.1.1, we recommend changing this ASAP, see step 5)
Firstly do the firmware, this shows a stable release we have been using
Once those are done, you can follow @MartinLangmaid notes. You can also find more details here
Note: You will need to set up your management IP within your Peplink/Pepwave router to match what you did in step 5 above. If you use the same subnet as in the example, then you could put the Management IP of 192.168.100.254/24.