Forum ©XSIBackup: ©VMWare ©ESXi Backup Software

I wonder what "High speed and deduplication is not available in XSIBACKUP-FREE" means in the header of the log file. Is the backup speed to an NFS resource limited to 10Mbs?
When I'm backing up to an NFS server, the network cards are 40GB Ethernet (tested - other data goes fast) but the maximum backup speed is only 10Mbps.