if client is in netbackup environment, you can use JAVA GUI or Windows Admin Console
how-to:
http://www.symantec.com/business/support/index?page=content&id=TECH36002
https://help.maximumasp.com/KB/a336/how-do-i-restore-files-on-my-dedicated-server-with-netbackup.aspx
http://www.uni-jena.de/unijenamedia/Downloads/einrichtungen/rz/dienste/zentrale_anlagen/backup/NetBackup6_5_BAR_GS_Guide.pdf ( PAGE 16 )
if not you need to install netbackup client software , configure bp.conf ( add media servers ), check connection between hosts...
Regards,
Marcin