Interface DSL exists

Hi,
just playing with one of my test devices ( RB750G, ROS 6.41rc52 ) i have found that there is some DSL interface with basic commands :

/interface dsl> set 
arp          comment   l2mtu        mtu   vci  numbers
arp-timeout  disabled  mac-address  name  vpi

Have i missed this in some release-notes or forum topic? I have googled without any luck.

C’mon guys,

Someone must know something about this :blush:

http://forum.mikrotik.com/t/radius-server-not-working-in-2-8-11/127/1

Thanks alot!