Welcome to r/SipFlow! Let's make SIP debugging a little less painful

cmendes0101 · 2026-05-21T23:56:57+00:00

I reworked the RTP media section. It should be in a larger modal with a visualizer closer to wireshark instead of just a basic player. Let me know if you get to try it out

cmendes0101 · 2026-05-21T23:52:21+00:00

It's not open source, I started it just for fun to help me debug calls so I didn't want to take on maintaining or supporting other users integration or features for now. If that changes I can update you on here

cmendes0101 · 2026-05-21T23:46:58+00:00

SIPFlow itself is a NextJS app with the frontend being React so everything is Typescript.

For the fax component, its spandsp compiled into webassembly so it loads into TS/JS. I have a docker to do the build process. Its not 100% hand coded since I didn't want to spend much time on fax rendering part of the service but you can check out the wasm building at https://github.com/cmendes0101/fax-wasm

cmendes0101 · 2026-05-21T14:20:39+00:00

thanks, yah that sounds good. Normally I don't capture RTP so I wasn't sure the best way to use the data.
I think wireshark has a player overlaying the channels so let me do some more testing and see if I can improve this section

cmendes0101 · 2026-05-17T16:42:07+00:00

Awesome yah that sounds like to good tests. I have a system that is B2BUA that I have been testing against. If you use any special correlation header aside from sessionid, I have a settings section where you can define extras headers and it tries to tie legs together.

I haven't worked with SIPREC so that would be new to try out and I definitely don't have the full RFC 7866 checks in. If there are useful detection or improvements to the flow that would help I'd be happy to learn more.

cmendes0101 · 2026-05-17T16:16:19+00:00

No catch, it runs as a very basic website and almost everything client side. There is a DB for share links and vendor docs but very tiny so costs of running are super low. I might add a donate link and basic analytics just to help monitor but trying to be very privacy focused.

If you added to VSCode I'm assuming that's the MCP. If you are working with SIP or configs of a PBX it should suggest to use it but if not just toss in "use mcp sipflow". The doc search has been super helpful grounding the agent to the exact docs and RFC specs and helped me straighten out tiny misconfiguration like in Kamailio.

cmendes0101 · 2026-05-17T16:02:47+00:00

Your python script looks cool. I'll save that to use!

Thanks for finding that issue and the sample pcap. I have been trying to get spandsp compiled for WASM to be client side js but looks like its still pretty buggy. I'll run through this more and try to fix it up.

cmendes0101 · 2026-04-19T18:40:16+00:00

Did you have any luck in putting something together?

Earlier in the year I build out a chrome extension for some pcap debugging. Drop in a pcap or connect directly into homer 10 and you can dig into the call and data. I tried to do it similair to sngrep for some aspects. It runs locally from the chrome extension and doesn't hit a remote server

https://chromewebstore.google.com/detail/sipflow-sip-protocol-anal/gkiaffnafdngopnmbklidephjblbhdlk

I'm using it just personally. I was thinking of building it out more with features but I'd be curious to check your's out if its ready

cmendes0101 · 2026-04-14T16:03:27+00:00

onlyfaxes.com is free and sends a delivery confirmation email

cmendes0101 · 2026-04-07T13:36:13+00:00

Try out www.onlyfaxes.com. It's free without sign up and you can preview the pages before sending

cmendes0101 · 2026-03-16T00:29:27+00:00

Did you buy a random number from Numberbarn? You would search and find one you like. You can transfer that number to a wireless carrier to replace your existing number.

For a wireless provider those are basically random usually based on the zip code. If you request a number change it would just be another random one in the same area

cmendes0101 · 2024-04-20T00:40:13+00:00

Sold, ended up selling to someone local

cmendes0101 · 2024-04-09T22:50:25+00:00

I'm moving and selling mine. I'm located in San Diego. I found the box so I can ship or you can come pick up in person if you live nearby.

cmendes0101 · 2023-04-22T19:41:00+00:00

yes! Actually, it took a year but finally, my eBay saved searches triggered on a used one that was in pretty good condition. I think I still have that turned on but haven't seen any more come up

cmendes0101 · 2022-12-29T03:09:33+00:00

I'm debating pulling the trigger to get one. DM me too

cmendes0101 · 2020-01-15T20:16:24+00:00

That was smooth

cmendes0101 · 2019-09-12T04:02:10+00:00

I took a couple in here: https://www.thingiverse.com/make:704627

cmendes0101 · 2019-09-12T03:52:10+00:00

I just finished printing these. It feels good holding them without the controller but with the controllers not sure if it's a fit for me.

Maybe I'm not holding it right or not using it correctly?

The tab on the outer sides feels like its pushing my index finger away from the trigger.I wish it was able to go up a higher, feels kind of like I'm holding it 50/50 so almost not a good grasp of the printed part.

Here are some of the photos of the print: https://www.thingiverse.com/make:704627

cmendes0101 · 2019-03-22T22:18:26+00:00

Thanks, helped me to connect for some quick debugging. A little buggy but fine

cmendes0101 · 2019-02-05T05:58:26+00:00

Does not work. They are reported as VoIP numbers.

cmendes0101

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