Can anyone tell me if i can run two ADSL telephone connections on a 2850n.

Like one from the phone line to the ADSL port on the 2850n and another ADSL connection on the VDSL port, or is that impossible?

It is possible yes but not sure about the option you mentioned because the newest 2850 models has one wan now for adsl/vdsl (sharing) and is using a splitter to separate each connection and as wan 2 is using the lan 4 as second wan port

The picture at 2850 at Draytek UK web has old model picture with 2 wan ports next each other
New 2850 models are like this
http://www.forum.draytek.co.uk/viewtopic.php?f=12&t=17573#p74295
see picture of this post

At the moment only the 2830 (exactly same specs same speed with firewall etc but adsl only not vdsl)) has this set in the hardware (2 wan ports seperate next each other) but only one build in adsl model
If you want second adsl you need to get an other adsl model and a small guide below for both models


See this link (is with 2920 but same apply to 2850 as it is dual wan just one modem is build in)
http://www.increasebroadbandspeed.co.uk/draytek-2920
at adsl wan port of course add the 1st line
at wan 2 (lan 4 at draytek 2850) connect an adsl modem (ideally a vigor 120 V2) bads.com has some used items with warranty (can give you link if you want) but if you have any old one still ok
and connect it via pppoe or static or dynamic ip as mentioned at link up

The option you have mentioned not sure with 2 adsl lines but a guide is here from draytek UK with the 2850 you mentioned
http://www.draytek.co.uk/support/kb/kb_vigor_v2850_dualDSL_setup.html