Mastodawn

dialup.world Jul 19, 2023

#introductions We cobbled together a free-to-use dialup ISP out of trash and spare parts. dialup.world is composed of four modems for simultaneous connections delivering speeds up to 33.6K.

This is currently a bunch of USR Sportsters hooked into Linux, but we are currently working on setups with Cisco gear, as well as some musings in 56K, other weird dialup appliances, and retro networking.

Check our website http://dialup.world for more information about the setup and how to access! In addition to the PSTN, you can also connect through PhreakNet (https://portal.phreaknet.org), a sort of telephone hobbyist/phreaker/collector darknet.

We also supply dialup access to the WebTV Redialed project (http://webtv.zone) which means if you dig your WebTV out of storage and hook it into a phone line, it *just works* with the original toll-free number and no modification needed on your part!

I invite you to watch our bad ideas become reality.

#modems #dialup #retronetworking #webtv

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Chartreuse Jul 19, 2023

@dialupworld Just noticed a mention of voip.ms on your site. Are the modems hosted on there?

Nice benefit there is that voip.ms to voip.ms calls are free so no 1c/min rates for people dialing in with that option.

I've had good luck with them doing modem lines myself.

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dialup.world

@ChartreuseK Indeed, I have a SIP trunk from voip.ms which ultimately terminates at the modems. The quality is fairy good and most people are able to call in with minimal issues!

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Chartreuse Jul 20, 2023

@dialupworld Yeah with the right ATA settings I've been able to do from 300 baud with no error correction up to 33,600 just fine on it personally. Just a bit higher latency than a non-voip connection due to the need of a fairly large jitter buffer. Will have to try dialing in later today.

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Keiko Jul 21, 2023

@dialupworld @ChartreuseK You mentioned you might try a 56k service. Which server side modems are you planning to use? Are you going to do E1 or T1? What will you use to convert SIP to ISDN PRI?

I ask all of this, since I used to work for a company that designed and built IP gateways, and we developed all our own signalling stacks for all of these systems (sans the 56k modems)

I still have all the code in an archive.

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dialup.world Jul 21, 2023

@keiko @ChartreuseK Two possibilities here.

1) I have all of the hardware that this person used to create their in-home 56K setup outlined here, https://www.reddit.com/r/vintagecomputing/comments/t5m1l5/inhome_56k_isp/ Basically it would be composed of an ISDN simulator, USR I-Modem, and an ISDN TA.

2) My friend has a Cisco AS5300 he is working on setting up and is converting SIP to ISDN PRI from an Adtran Total Access unit. The Cisco has a few dozen MICA modems that should support 56K.

In-home 56K ISP

Posted in r/vintagecomputing by u/Retrocet • 206 points and 38 comments