What is your goal with the 2 ADSL lines.
Are you looking for some load-balancing solution or primary / backup situation.
Maybe it is worth reading this http://wiki.mikrotik.com/wiki/Manual:PCC
This will help you build a load-balancing solution with failover capabilities.
I have two ADSL at home, and I have a mikrotik crs125-24g,
with an ADSL I made a link from A POINT - POINT B, where output I have a mikrotik rb951, links working perfectly ok.
Now what I would do,
I would like to enter them in STEP A, another ADSL line and configure it with the POINT B, where output will get a router that will give me only exclusively the new ADSL added.
I do not know if I was clear.
Thank you all for your attention
I spoke to mangle …
But honestly I have never done such a configuration.