Mikrotik does not have to add support for ADSL for this. Rather than just saying "No", maybe a redirection would be more fruitfull!
There is one product currently that I know of, Viking PCI ADSL2+, that I know of that should work perfectly, as it handles all the DSL stuff itself. The OS just sees an RTL8139 ethernet controller, which Mikrotik already supports. Downside, is that in Aus, these things are selling for A$130, which is a bit rich.
The reason people want this is to be able to use the Mikrotik Router OS for DSL, without having to have to have
two boxes to provide the function.
Years ago, when ADSL was new to Australia, the telco used to supply a dumb bridge, that simply demodulated the DSL, and you had to do the PPPOE from the PC/Gateway or whatever you used. This would be perfect, as you'd connect directly to the device to set up the modulation settings, etc, and the rest done from the
However, that too was external but they were only tiny and could be integrated. I cannot find these things anymore.
Nowadays, people buy ADSL routers and switch them to bridge mode, but that still requires an extra box (yuck!).
It is a pity, because RouterOS is so far superior to what you find in off the shelf ADSL routers.
Also, from the latest Mikrotik Newsletter....
"Our distributors are already offering a wide selection of CPE enclosures, antennas, custom indoor cases, rackmount routers, for example this special RouterBOARD case by FMS-web Germany
(
http://www.fmsweb.de) , that has a built-in DSL router"
The one pictured is way beyond SOHO, but maybe they are worth talking to.
Also, given that Mikrotik is linux based, would it be that "out of the box" to add a restricted driver management function?
And one final note: Yes there are a lot of ADSL routers available out there, but compared to RouterOS, the so-called "router" functionality in them is crap. This is why people are switching them to bridge mode and using a Mikrotik in line!