@simplenomad yes and note that the faxmodem trick was a classic to pop "secure networks" in Europe through the 1990s… not that I have ever done that, of course, but I do still own a USR Courier V.Everything purely for sentimental reasons, you understand.
The advantage was that the fax number was published, it was trivial to check if it was a fax modem and then the admin credentials were "the usual" for all major brands (Xerox, Canon and Minolta are three I still remember fondly)
@borup there were several of those stories / lore including the fabled modem used for the maintenance of the mainframe right into the core network at a particularly secure site which had an air-gapped network… The '90s were more fun from the perspective of "entry options".
@simplenomad I definitely have a memory hiding in the back of my brain around this, but can't remember enough details to find it.
I am down to my last Zorkmid, too, so I could definitely use more. I'll have to research more.