#PSTN

2025-12-01
2025-11-20

@PGBeattie

It already exists, long since. But it's only available on SIP 'phones. Loop-disconnect signalling doesn't have the protocol for sending the data.

But on a SIP call the SBC can do what is known as a CNAM lookup when a call comes in, and fill in the initial INVITE with 15 characters of looked up information about the caller. There are various people/companies providing/selling CNAM lookup service.

If your 'phone company has switched over your landline to digital, this information (assuming that TPC's equipment is indeed doing the requisite CNAM lookups, which it possibly still isn't for residential subscribers) is now getting as far as a plastic box in your house and being thrown away there; because whilst it is now VoIP to that plastic box, there's no protocol for sending names from that plastic box over the RJ11/BT connectors and 2 wires to your 'phone. Caller ID is sent over that very last leg using DTMF.

#SIP #CNAM #ComputerTelephony #PSTN #CallerID

2025-09-03

Chefs-d’œuvre du corps humain du Conservatoire d’anatomie de Montpellier
François Bonnel, Caroline Ducoureau, Christophe Bonnel. -biusante.parisdescartes.fr/sfh
#histsci #histmed #PSTN #resteshumains

page de garde de l'article montrant un plan large du très joli Conservatoire d'anatomie, avec ses vitrines anciennes et ses plafonds peints
Kevin Karhan :verified:kkarhan@infosec.space
2025-08-28

@paavi @kurth @John_Loader @amiserabilist @MAJ1 @kibcol1049 actually fmr. GDR until the completion of #HyTNAS (digitalization of the German #PSTN based off #ISDN + #ADSL Annex B from the first outdoor switch onwards!) there were even some 1920s mechanical dialing systems still in use.

  • Needless to say it was considered "worse than a fully destroyed modern network" because it was stuck on pre-1939 capacity.
2025-08-07

Well, that's the end of a very long era. Not that I could use it if I wanted to as my land line is long gone.

#aol
#pstn
#dialup

a blue banner with the AOL logo on the left.  below that the following text:

Dear JAMIE,

As we evolve to meet the needs of today's digital landscape, we've decided to discontinue dial-up service for AOL plans beginning September 30, 2025.
Kevin Karhan :verified:kkarhan@infosec.space
2025-07-20

Now some folks may say: "Why don't you just get a regular-ass #AUI like a #NormalPerson?"

1. Simply because noone but the most tech-masochistic folks want to deal with like #coax cables, #VampireTaps, huge #MAUI boxes and rare vintage stuff + overhead to get a slow & underwhelming network experience. Pretty shure neither @ncommander nor @TechTangents would either.

2. The few late-era #10BaseT-based AUIs do exist but they are long out of production and thus quite expensive. And if you are on #10Base2 or even #10Base5 good luck finding a still working #switch that isn't sold by a #scalper like #ersazza way above #MSRP+#inflation!

3 An AUI is just an Interface port / media converter similar to #SFP & GBIC and necessitates a NIC already inside the machine.

4. AUIs are not just long outdated but also way more inflexible, whereas basically anything from an #Apple2 up to the latest #Android-#Tablet can be adapted cheaply to do #RS232 #serial and send AT commands to a #Modem.

5. Twisted-Pair Ethernet is cheap, commonplace and still supported and pretty much forwards- and backwards compatible. 10BaseT will run on Cat.3 but also on Cat.5 and even Cat.8 cables (In case one wants to hookup a vintage computer on a 40GBase-T port for no reason but to see if the switch does negotiate proper 10Base-T.

6. Because it's useful...

7. as said before: AUI port would be nice to have but not necessary...

8. it would allow Network access similar to #dialup abeit without the need for existing #PSTN infrastructure like @c3isdn has...

A big-ass Medium Attachment Interface Unit that gets clamped onto a thicc coaxal cable.

It's a bout tue size of a Desktop PC's Optical Disk Drive with a *WIDE* 15-Pin port at it to connect to tge actual Ethernet card.A late-era MAUI with a 10BaseT RJ-45 port at the end made by Level 1.

It's way less chonky but still needs a NIC with AUI connection.
2025-07-07

#Parution Vient de sortir le numéro spécial de Histoire médecine et santé entièrement consacré aux moulages médico-pathologiques en cire.
On y parle entre autres des collections de l'Hôpital Saint-Louis à Paris, et du conservatoire d'anatomie de Montpellier. On y présente aussi deux exemples africains, au Mozambique et en Ouganda.
journals.openedition.org/hms/9
#histsci #histmed #MaterialCulture #pstn #patrimoine

2025-07-05

Comment vous êtes vraiment forts au jeu de l'objet mystère, en voici un autre, toujours des anciennes collections pédagogiques de Lyon 2.
Idées et boosts bienvenus !
#histtech #histsci #patstec #PSTN

Appareil métallique avec un faux air de toaster vintage (avant qu'on leur mette une carène), avec des poids (?) en forme de virgules qui semblent pouvoir glisser/tourner vers le bas.
Ça doit être lourd comme un âne mort, mais à quoi cela pouvait-il bien servir ?
2025-07-04

L'objet-mystère du jour est ce cube à ressorts retrouvé dans le vieux matériel de démonstration de Lyon 2.
Une idée de manip' ou de phénomène physique que cela pourrait démontrer ?
Précision : "La boite au milieu s’ouvre (le morceau en dessous)"
Boosts bienvenus
Edit : merci à tous ! Il s'agit très probablement d'un "tuned mass damper", ou amortisseur harmonique. fr.wikipedia.org/wiki/Amortiss
#histsci #histtech #pstn

boite métallique cubique suspendue dans une armature métallique cubique par des ressorts attachés à chaque coin.
Kevin Karhan :verified:kkarhan@infosec.space
2025-06-07

@nofollownoindex @cR0w @Dio9sys @da_667 #Tenda #EoL'd such new hardware?

  • Shit, that reminds me that some folks just recently got themselves some #4G06 & #4G07 units because they needed a cheap #VoLTE - #FWT to hookup seniors' landline phones on because it's cheaper to migrate to #sipgate / #simquadrat than having to swallow a forced migration from #AnnexB - based #PSTN (#HyTNAS) to shitty and overpriced #VDSL!
Forstforst
2025-03-30

I came to a realisation that I'd make regular phone calls more in general and favour calls over e-mail and online support requests if the support for was more universal.

I find it hard to understand people on regular phone calls because it sounds very muffled, and it's bizarre how to this day we're stuck with a low sampling rate and quality on regular calls. Even on mobile, different carriers often don't cooperate and don't support HD Voice between themselves.

2025-01-11

I tried to call one of my doctors today, and my #Android phone told me "Server Unreachable".

What? What server is a telephone using to dial another telephone over the #PSTN? I checked my VPN, working fine. My IP connectivity was also fine.

Turns out one digit of the number was wrong.

Why the badword would the message not say, "Phone number is not assigned" or some other, you know, useful #ErrorMessage?

2024-12-12
Soo, I should probably try to grab my still untested Panasonic KX-T206SBX to #38C3 and see if we end up connecting it #PSTN
an appliance in a retro enclosure saying "Panasonic" "206 Telephone Switching System". To the right the cover is removed and we see two arrays of connectors and a ground screw and several stickersCloser look at the opened panel, with the previously unseen lid to the right. The two arrays of four-pin connectors are labelled CO2 CO1, DPH, and EXTN. 1 to 6. A grounding screw connector below. Stickers above are Polish Ministry of Communication certification, Instel Technika Telekomunikacyjna warranty seal with city-local phone numbers, and a "Caution: To prevent electric shock, do not remove screws. No user-serviceable parts inside. Refer servicing to qualified service personnel. ¦ Warning: This apparatus must be earthed. PSQT1043ZB". Everything is quite a bit dirty.
CCC event ISDN/POTS networkc3isdn@chaos.social
2024-11-24

Join our #ISDN and #PSTN network at #38C3 isdn-museum.de/ccc/ for some
Mailbox & Internet Dialing @38c3 (4k version)
youtube.com/watch?v=gQ3yxpuFi7

image/jpeg
2024-11-08

Je vois passer les résultats du concours INP : 2 postes #PSTN ouvert, un seul pourvu.

red_rooster :coolified:red_rooster@sueden.social
2024-11-03

@c6h12o6 @SonstHarmlos
Das wird bei uns nicht passieren, da man bei Leuten in einem Produktionswerk heute einfach tragbare Telefone braucht. Aktuell ist das für die Produktionsebene noch das #DECT #Telefon . Auf Dauer wird man keine zwei #drahtlos #Netzwerke für #Telefonie haben wollen.
Deswegen #Teams , das es auch auf dem #handy gibt und mit dem man auch gegen eine kleine Gebühr ins #PSTN telefonieren kann.

2024-07-22

La journée d'étude PATSTEC organisée par la mission nationale de sauvegarde et de valorisation du patrimoine scientifique et technique contemporain du 28 mai dernier a été mise en ligne !
#patstec #histsci #histtech #pstn
patstec.fr/news/33/121/Journ%C

Kevin Karhan :verified:kkarhan@infosec.space
2024-07-18

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