backup MSSQL database to a client's local disk over network

I'm trying to backup a MSSQL server from linux. I'm able to connect to the server using tsql (from the freetds project), and I'm even able to backup the database on the server using the backup database command, but I haven't been able to download this backup onto the machine I'm using to connect to the MSSQL server. If this was a mySQL server, I could download a backup of the database using mysqldump. Is there something similar I can do for an MSSQL server in linux?