You will probably have a problem if you try to back up data over a TOPS
network to an Apple Tape Backup 40SC. The reason is that Apple Tape Backup
software is designed for local backup only. In fact, if you try to back up
files from a computer other than the one you've connected the backup unit to,
the backup software returns an error message that it cannot back up server
files.
Other products let you back up over a network. SuperMac Software's Network
DiskFit is one product that is designed specifically for backing up
AppleShare or TOPS servers and workstations.
For more information, search the Tech Info Library for "SuperMac".