You'd want to shut down SQL before the OSSV backup takes place, to get a consistent image of the database.
Alternative would be to use NetApp storage for the remote office SQL databases with SnapManager for SQL,
then use integrated remote backup capability integration with Protection Manager...
I hope this response has been helpful to you.
At your service,
Eugene E. Kashpureff
ekashp@kashpureff.org
Fastlane NetApp Instructor and Independent Consultant
http://www.fastlaneus.com/ http://www.linkedin.com/in/eugenekashpureff
(P.S. I appreciate points for helpful or correct answers.)