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#cellbroadcast

0 posts0 participants0 posts today
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Kevin Karhan :verified:

@LaF0rge @stman @kDelta @Sempf obviously that's why it was discontinued for a time in #Germany, as it was considered as obsolete as #HSCSD is in light of faster standards that - even without guaranteed bandwith - will yield higher throughput.

  • Obviously #CellBroadcast will necessitate a constant bandwith allocation for functionality as it's design is based upon repeating a message until it's transmissiom being removed.

Still, even in contended #spectrum this is manageable, espechally since most #MNOs only maintain vestigal #2G or #3G infrastructure solely for #emergency coverage and reliability, as most phones will call emergency services over 2G and 3G and not via #VoLTE.

  • To add insult to injury, most BSCs will downgrade to 2G-only service by default in case of power loss to maximize UPS range and in the case of #NewZealand even switch off all services but #SMS & #EmergencyServicesCalling to enshure people in need can get their calls out, as the population is instructed to use SMS for person-to-person communication (as SMS is a low-priority, non-realtime service using excess bandwith and thus not compete with calling like #EDGE and #CSD would.
Infosec.SpaceKevin Karhan :verified: (@kkarhan@infosec.space)@stman@mastodon.social well, there were *some commercial services* that used #CellBroadcast but for the most part it's *best feature* is the effective mass alerting of people in an area without needing them to *install yet another app* or *signup to yet another service*... - The [temporary] shutdown of #CellBroadcast caused hundreds of avoidable deaths [in Germany alone.](https://en.wikipedia.org/wiki/2021_European_floods#Germany) @kDelta@mastodon.ie @Sempf@infosec.exchange @LaF0rge@chaos.social @nitrokey@nitrokey.com @signalapp@mastodon.world @GrapheneOS@grapheneos.social
#newzealand#SMS#emergencyservicescalling
Replied in thread
Kevin Karhan :verified:

@stman @kDelta @Sempf @LaF0rge Personally I think that with all it's problems, and #GSM as well as it's successive versions have many, #CellBroadcast isn't one of them!

mastodon.social/@stman/1148628

Mastodon★ STMAN ★ 🏳️‍🌈 (@stman@mastodon.social)@kkarhan@infosec.space Cell Broadcast.... was one of the best functionality of GSM. It has actually NEVER been used just because of MONEY. There was no way to earn money with CELL BROADCAST easily, so it was abandonned. USer safety ? They don't give a fuck. Only Money. We live in societies so close from SQUID Game. It is SQUID GAME actually. @kDelta@mastodon.ie @Sempf@infosec.exchange @LaF0rge@chaos.social @nitrokey@nitrokey.com @signalapp@mastodon.world @GrapheneOS@grapheneos.social
Replied in thread
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Kevin Karhan :verified:

@stman well, there were some commercial services that used #CellBroadcast but for the most part it's best feature is the effective mass alerting of people in an area without needing them to install yet another app or signup to yet another service...

@kDelta @Sempf @LaF0rge @nitrokey @signalapp @GrapheneOS

en.wikipedia.org2021 European floods - Wikipedia
Replied in thread
Kevin Karhan :verified:

@kDelta @stman @Sempf @LaF0rge @nitrokey @signalapp @GrapheneOS

Given the hamfisted "Australian Approach" I disagree.

  • Noone here claims #2G or #3G are safe but don't you think stuff like "Emergency Coverage" and #CellBroadcast are useful?

Will be interesting to see if Australia can pull that off without having to reenable 2G, cuz I've not heard of a #4G implementation of it...

en.wikipedia.org/wiki/Cell_Bro

YouTubeAustralia’s New Firewall IMEI BLOCKED 516,875 Active Phones Overnight + Tourists Phones BlockedBy Hugh Jeffreys
devrtz :debian:

📢 Cellbroadcastd 0.0.1 was released yesterday 📢

#cbd provides the following:
- persistent storage of received #CellBroadcast messages
- notifications for user interfaces/DEs to handle
- set channels to subscribe to (based on country)
- CLI tool for inspection/debugging purposes

gitlab.freedesktop.org/devrtz/

Many thanks to @NGIZero for funding, @agx for involving me and tons of review and @snwh for UI design!

#LinuxMobile#Phosh#GNOME
Continued thread
Guido Günther

@devrtz @NGIZero @snwh …and as a service to user interfaces/DEs that don't want to add explicit #CellBroadcast support #cbd can now send notifications. Just enabling the setting is enough.

This is configurable on a severity level so you could use a system modal dialog for high severity events and notifications for low severity ones. This is (likely) how we'll wire it up in #phosh once everything has settled in.

#LinuxMobile
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Guido Günther

Another #Cellbroadcast bit coming to #phosh / #LinuxMobile. The results of the users choice are set in the modem via a small daemon based on information we're getting from mobile-broadband-provider-info. That way only the tiny UI bit is DE specific, the other bits can be reused on other platforms as is. @devrtz is working on adding persistent storage to keep a message history.

Thanks to @NGIZero for supporting this and @snwh for the UI design.

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leChris :mastodon:

@holger

Das mag an den verschiedenen Alarmierungen & techn. Einstellungen liegen: Es gibt den Cell Broadcast als (priorisierte) 1:n Verbindung zu allen Mobiltelefonen, die in einen Funkmast eingewählt sind: de.m.wikipedia.org/wiki/Cell_B

Mir ist nicht klar, ob diverse WarnApps wie NINA, KATWARN und Co eine normale Warnung über das mobile Internet senden oder auch den oben genannten Service nutzen und visualisieren / akustisch ausgeben?

Der in D eingesetzte (leider vom int. Standard abweichende) Cell Broadcast wird daher nicht von allen Smartphones & mobilen Betriebssystemen unterstützt:

Zitat - siehe Quelle oben:
"... Bundesrepublik nicht den ... international bewährten Cell-Broadcast-Standard nutzt, der mit quasi allen Handys und Smartphones kompatibel ist, sondern ein eigenständiges System ... entwickeln ließ, werden viele Nutzer älterer Smartphones sowie alle Nutzer klassischer Handys nicht gewarnt. Es wird ... ein Gerät mit mindestens Android Version 11 bzw. iOS 16 vorausgesetzt."

de.m.wikipedia.orgCell Broadcast – Wikipedia
#warntag#cellbroadcast
Ansgar Hegerfeld

Dass es bei bei Cellbroadcast-Warnungen extra die Kategorie "Testalarme" gibt, damit die Menschen einen Testalarm auch als solchen erkennen können? Das Fax scheint noch nicht beim deutschen Katastrophenschutz angekommen zu sein 🤷

In #Hessen setzen wir beim Testen auf die beiden Gefahrenstufen "hoch" und "Extreme Gefahr" mit einem Text, der keinerlei Hinweis bzgl. eines Testalarms enthält. Sehr vertrauenswürdig!

#Warntag#Cellbroadcast#katastrophenschutz
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Kevin Karhan :verified:

@MishaVanMollusq @Unixbigot reminds me of the #Ahr valley flooding which killed a lot of folks because none of the media and civil protection talked about it and #CellBroadcast was shutdown years ago...

  • The latter one being reinstated & mandated by @BNetzA and @bmi as a #warning system shortly after!

My advice: Keep to it and ideally be ready to GTFO up hill / to the side on a minute's notice!

en.m.wikipedia.org2021 European floods - Wikipedia
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Guido Günther

Successfully tested receiving #cellbroadcast messages on the #PinePhone as well:

# _build/test/mmcbmmonitor
[/org/freedesktop/ModemManager1/CBM/0] new cbm: received
4371: Hallo, this is a CBS test message

So hopefully all devices supporting `+CSCB` on an AT port should now be able to show these messages in @phosh (if the MR makes it into the next #ModemManager release).

The #osmocom stack is such a great help for testing these things.

Thanks to @NGIZero for supporting this.

#LinuxMobile
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