Couple things to try.
One way is to use the NCPFS package(s) in conjunction with the nice opensource novel client
http://sourceforge.net/projects/novelclient
Another way would be to 'try' to use the native Novell client for linux (search Novell's site), although this client is only intended to be supported/used on NLD9/SuSE9.3 is 'can' be made to work on other distros, but good luck.
Alternate ways could be done using NFS or even FTP, but these would require someone to properly configure those services on the Netware box itself. And depending on the version of Netware you could also try CIFS.
Since You're using Debian, I'd take a look at the sourceforge/ncpfs option first.
Dave