bwann

I've been running it the last year or two to get e-mail to a vintage DOS BBS that had a UUCP package. I was pleasantly surprised it was out of the box usable on both CentOS and Debian, and Postfix still ships with example UUCP email config.

Vintage bulletin boards and running a retro UUCP network

The key is to use a non-compressed codec such as G.711u/a-law, and disable echo and silence suppression. I can regularly get 28.8k-33.6k carrier speeds across the US when using an ITSP/VoIP provider and my modems connected to Grandstream/Linksys/Cisco analog telephone adapters.

and V.35 and X.21!

Back in the ISP days of the 90s, if you used the Microsoft Internet Explorer Administration Kit (IEAK) and wanted to distribute customized versions of IE to your customers, one of the requirements was to use IE-only elements on your main website to promote usage of IE. Marquee was one of the least obnoxious ways to do that compared to other options.

Qmodem was my favorite comm program during the BBS days, and it still is today when working with vintage computers. It was just nice to use. Its scripting language was the first I used and I find myself wishing there was a Linux comm program with scripting that worked that well. Long distance calls were expensive so I used a Qmodem script to call BBSs each morning to download my email before school.

Just the last several months I've been using Qmodem scripting to make thousands of modem calls over VoIP to test downloads to see which models and ATAs work best.

After I jumped back into the vintage BBS world I've been keeping an eye out for anything Qmodem. I recently just picked up a Qmodem manual on ebay that I wanted to scan and archive, because it's pretty rare to see.

Not too long ago I saw where John had posted to a FB group he was working on a new DOS version of Qmodem, my first interaction with him. I was excited to see it be worked on again and hoped to see the new version. Sad to see him go.

These were pretty decent, not too terrible, and could be set up to dial normal ISPs. They filled a niche with older customers and/those who had zero computer experience but wanted to check email and browse web pages back in the 90s. They didn't last long enough to bridge the gap to the tablet era, so I'm guessing a lot of people finally had to learn a computer.

I do remember playing some MIDI files on it and realizing how good it sounded compared to my basic SoundBlaster 16, which made me go out and get a SB AWE32.

truss, that's a command I haven't seen in a long time

I'm surprised there's no mention of QBasic that shipped with MS-DOS >= 5.0. This was built on top of EDIT.COM, and while it only ran a BASIC interpreter instead of compiling an executable like full-blown QuickBasic.

IIRC it had a rather extensive help lookup system for functions, data types, reference tables, error codes, and whatnot. You could step through your program, set debug points, all without exiting to DOS. It was my first ever exposure to an IDE, I thought it was pretty nice for what it was.

Traffic to vs through a router; both UDP and ICMP probes to a given hop will both go to the control plane which can be rate limited or handled by a general purpose CPU.

Probes to hops beyond will virtually always go through the fast data plane.

Trivia: 32,768 + 666 is the usual starting port of most implementations

+1 for this, I always recommend ras' tutorials at NANOG. He goes into a lot of detail people just hand wave over or don't even consider

Usually this meant the new neighborhood was put behind a subscriber loop carrier (SLC) which added an extra analog/digital conversion. Voice calls were getting digitized locally, sent across a T1 (only 4 wires needed, instead of 96-192), and back to analog to the normal frame at the CO. The effect of this was the telltale sign of carrier speeds only hitting 26,400 bps.