routing via prefix and smsc..

Hello all!

This is a kind of problem, or may not be but I'm not finding out what
todo..

For our Sweden SMSC's we can send alphanumeric just through two out of
three operators (telia doesn't support alphanumeric sender). Today we
route all outgoing SMs depending on what prefix the mobile number has.
This works very well but now we want todo that with just two SMSCs. That
is if someone is sending as with alphanumeric sender we would like to one
of the two SMSCs we have depending on prefix (send all to vodafone through
vodafone and all the rest through tele2 since they are cheaper in sending
to other networks). That routing would be done via prefix. Is this
possible ? It doesn't look like that ? I've been trying around with
preferred-smsc-id and denied etc. together with the prefix. But the prefix
routing doesn't seem to work if you do as the above example.

??

/S