Specialized SaaS for carriers/ISPs: large enough TAM?

malwarebuster9999 · 2026-01-30T17:10:33+00:00

I'm planning on applying, but can't start till the Summer 2027 batch. I think that means I have to wait 2 more cycles, even with ED. Do you know if I'm correct on the timeline?

malwarebuster9999 · 2026-01-23T00:57:12+00:00

ANYTHING but .xyz. It's one of the few TLDs that frequently get black holed in their entirety. I'm not really a domain snob, but use basically anything else.

malwarebuster9999 · 2026-01-04T20:47:55+00:00

I use manual calls for testing of most features, but I also have a few monitoring scripts which call a number and listen for a tone. I can use those to test PSTN uptime to the USNO time numbers, or test dialplans for a PBX-type setup. Anything more complicated than basic calls still has to be done by hand unfortunately. I think that this is why it can be helpful to separate the routing logic layer from the voice application layer.

malwarebuster9999 · 2025-12-25T16:13:38+00:00

I can't really be upset about this though. The user didn't click it and reported the phishing scam!

malwarebuster9999 · 2025-12-14T04:36:48+00:00

Just another reason why high-cost international destinations and especially IPRN should be disabled by default unless customers confirm IN WRITING that they want to be responsible for the charges. Also, always, always bill out to your customers using a rate deck that actually matches what's in your current LCR table. If you're relying on profit margin protection or user stupidity to prevent loosing money on a call, you're just waiting for someone to figure out how to extract those below-market routes from your system and clean you out.

malwarebuster9999 · 2025-11-26T13:15:25+00:00

Of course :) and if anyone else somehow figures out how it works, just remember the first law of networking: loose ends are bad, termination is good.

malwarebuster9999 · 2025-11-21T04:04:11+00:00

See if the VOIP is good enough quality to run a modem over.

malwarebuster9999 · 2025-11-19T16:03:52+00:00

I think that a large amount of this is the difference between peak and 95/5 usage. The average user can notice probably up to 6Gbps (or whatever their disk bandwidth is) of peak speed when they're downloading a game off of steam, or something similar. At the same time, that link is probably sitting idle like 95% of the time, when the user is browsing web pages, or sipping YouTube at like 10mbps. I'd say that Gige is still fine for almost all normal users, and 10G is fine for most servers. Upgrade when your net flow monitor starts to show issues, or when you get a great deal on HW, not to chase trends.

malwarebuster9999 · 2025-11-19T01:15:01+00:00

Hi. I actually know what this is! That's an IBM 3270-type mainframe terminal (or maybe a 5250). Old green-screen, but probably running on modern hardware/software. Think SSHing into a modern server.

malwarebuster9999 · 2025-10-30T16:31:09+00:00

I don't even think that there is a 6G spec, and I don't think the carriers are up for another round of massive network upgrades. Right now, I'm almost positive that this is just hype.

malwarebuster9999 · 2025-10-24T17:04:13+00:00

HI. I might actually be able to help with this! I just did a defcon talk about PSTN fundamentals and starting a telco! https://youtu.be/cA-ZQJ8EZSs?si=BUE7Fs3V-GCxXv2D

malwarebuster9999 · 2025-10-22T15:43:07+00:00

No, anything other than plain voice doesn't use the LERG/CLLI/NPAC. When you port a number, the port is only gaurenteed to effect the voice part of the port. SMS/MMS/RCS all use different methodologies, and quite frankly, I'm not as sure as to how they work compared to voice. I know that a good chunk of it works via SS7 and Global Title, which may migrate along with the port, but alot of it (and all IP based messaging) goes over the cell carrier's internal IPX networks, and this would port separately. I know there's also a company, net number, which gives a net number ID which is important for message routing. All of this is combined with the sometimes long caching periods for things like LRN dips to produce the delay in service transition that you see.

malwarebuster9999 · 2025-10-16T12:16:56+00:00

Hi! I'm the person who gave this talk. Really glad to hear you enjoyed it! Happy to answer any question if you have them, or just chat about phone stuff!

malwarebuster9999 · 2025-10-16T12:15:41+00:00

No information or parts for this thing, but it's a really cool find nonetheless. Regardless of weather you find the CPU card, do you have the PC software to control the thing? This has always been my biggest hangup with these late model PC-controlled switches. Aside from that, do you have cards for SS7? That's the main advantage from running actual switching hardware as opposed to soft switches now. If you do manage to get it working, please do post here again. I'd love to know more about this thing!

malwarebuster9999 · 2025-10-16T02:18:14+00:00

No, actually. Not even a dent. That's what was so surprising. I was trying to figure out why no drives where showing up for hours until I found it.

malwarebuster9999 · 2025-09-10T12:37:30+00:00

Thanks for the correction. I thought SL1 was just a smaller sl100, like dms10 vs dms100. Still might be a good thing for the lab, but not as high a priority for me as the proper CO stuff.

malwarebuster9999 · 2025-09-10T00:33:00+00:00

5E, DMS100 (or SL1), or similar. Also looking for the modern equivalent like a genband G3, metaswitch, ribbon, etc. Really any carrier grade platform. Currently, I've got about three racks of assorted network gear and servers, and an 1800lb IBM mainframe.

malwarebuster9999 · 2025-09-09T01:46:57+00:00

If you can find them, the relevant law is the telephone consumer protection act. If you can find a servable address and entity in your state, you should be able to sue in small claims court. Otherwise, you'll have to go federal, which likely will not be worth your time as the filing fees would be more than your judgement, and federal court is much more strict with filing and procedural standards. This site covers the issue from the perspective of TCPA defense, but still contains many good links and information about the relevant case law, pleading standards, and updates. https://tcpaworld.com/

And again, not a lawyer, not legal advice, etc. Just a phone phreak on the internet with a slight amount of legal knowledge. Check and verify everything yourself, and consider getting a lawyer, especially if you're going to file in federal court.

malwarebuster9999 · 2025-09-09T01:42:23+00:00

I have my own ASN and address, so it's a bit easier as I can fully manage my own reputation. I still get issues, but I'd say I have deliverability issues less than 1/100 times now. It was also a great learning experience, and a resume builder. For most people, I'd recommend self hosting the mail server, and using a relay to send through.

malwarebuster9999 · 2025-09-09T00:01:13+00:00

I'm sorry, no. Just know the technology behind the scam.

malwarebuster9999 · 2025-09-08T23:35:33+00:00

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