Post by @philpem@digipres.club

2026-07-12 19:53 UTC

I got tired of debugging SIP fax lines manually and annoying Marrold with dumb questions and my own stupidity. So I made this. It receives a fax, analyses the data and audio from it, and looks for common flamingo-ups like G711 alaw and ulaw mismatches or lossy resamplers. It can also detect failures in T.38->G.711 fallback and report that. Bonus: it tells you what your fax machine can do. And then it sends you a fax back with the result. And instruments that too!

Replies (13)

@attie@hachyderm.io 2026-07-15 10:15

@philpem@digipres.club Very cool! Could you explain / clarify the "as we received it" plot?

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@philpem@digipres.club 2026-07-12 19:55

EDIT - name sorted now, thanks

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@philpem@digipres.club 2026-07-16 07:12

Did this get posted on hackaday or something?

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@matoakit@beach.city 2026-07-12 19:55

@philpem@digipres.club This is really cool!

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@casandro@f-ckendehoelle.de 2026-07-12 20:07

@philpem@digipres.club If you need examples of V.34 fax, just tell me.

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@theorangetheme@en.osm.town 2026-07-13 01:50

@philpem@digipres.club I know nothing about faxes or telephony, but this looks so cool!

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@alphabetter@mastodon.social 2026-07-13 05:52

@philpem@digipres.club The solution you didn’t know you needed to the use case you didn’t know existed but still brilliant. I love it.

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@dan@discuss.systems 2026-07-15 07:10

@philpem@digipres.club as an enthusiast of memes-via-fax, I'm sold on this

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@bigjsl@aus.social 2026-07-15 11:19

@philpem@digipres.club ooooh, this looks super useful for supporting Australian medicos who are stuck with their fax machines. Would love a link.

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@maartje@blahaj.social 2026-07-15 13:13

@philpem@digipres.club i neeeed this

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@bonkers@nerdculture.de 2026-07-15 13:48

@philpem@digipres.club when the started my own business 20 years ago, I had a dilemma if I needed to buy a fax machine. I decided not to, and I actually never needed to receive or send a fax. Anyway, great job :)

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@phaseseeker@mastodon.uno 2026-07-15 14:33

@philpem@digipres.club I've always thought any form of modem-over-IP was a kind of sketchy/poorly working thing, but the SNR and jitter values here seem very good... Is it because you're doing it on your local network? Is it just that V29 at 9600bps is a lot more forgiving? A long time ago I was playing with some slmodem thing which theoretically could do V34 over VoIP but the thing was always far from stable even at way lower speeds...

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@zeroday@podcasts.social 2026-07-15 16:21

@philpem@digipres.club nyancat for the win!! That is a cool tool you got there...

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