svn via ssh to server (not local)

[Ruslan QuAzI]

How can I use via SSH something like this
svn co svn+ssh://svn.mainhost.org:8890/project/trunk
I need sources from svn://svn.mainhost.org:8890/project/trunk (svnserve -t with 
local path not have privileges)
Both ssh and svn have non standard ports. For ssh I change my ~/.ssh/config but 
how tweak svn to use network connection instead svnserve -t ?
Can't use "ssh -L" in parallel of sync (sync started from software)