I’m following a channel on YouTube named Serial Port (https://youtube.com/@theserialport) where they are trying to reproduce a 90s dial-up ISP. In my late teens I was a telecoms engineer installing racks and cabling so as mid-40s man this has sparked my interest again. I never got into the commissioning of the telco kit (Marconi, Cisco) so I thought I’d have a play now.

I have bought a Cisco 2501 and plan to network over a V.35 connection to something else (the start of my lab!). Can anyone point me to a kind place to start with learning the Cisco iOS 11 command line and how to configure the interfaces?

I wondered if an old CCNA book from the 90s would be a good start but google tends to point me to books / websites of today. Where can a find a book from the 90s?

Thanks in advance.