Do you remember the dreaded 'floppy disk is probably unreadable' sound during installation of any software on floppy?
To be fair by the time I 1st used Slackware that 300 baud modem had long been replaced and I at the time I had bonded ISDN channels for 128kbs connection paid for by my employer. Soon replaced by a T1 to my home also paid for by my employer.
Did you employer give you a spec-'d out computer/workstation too? I don't even know how you hook up ISDN equipment, but I know an SGI Indy had it built in.. ~1993.
I soon figured out that it was easy to skip the cdrom altogether and make a minimal install using just the boot disk and ftp. So easy yet you had to be deliberate and understand what you were doing. Such a great learning exercise.
I never thought of a T1 as "slow" until I started downloading CD images for Linux distros. The first cable modem connections I had were so much faster for downloads.
It would take a minute to copy the files to a floppy.
Funny learning how slow those are by today standards.
T1, T2, T3, OC-3, OC-12, and OC-48 are terminologies you don't hear anymore.