Changed my handle to fred.tel :)
fredoso.com | Fred Posner. Kamailio Consultant / VoIP Engineer
Fred Posner is a Kamailio/VoIP Engineer, specializing in Asterisk, FreeSWITCH, openser, and open source software.
fred.tel
November 17, 2024 at 7:37 PM
Changed my handle to fred.tel :)
Updated github.com/palner/fs-ev... with the ability to use "sendevent" with FreeSWITCH ESL. #freeswitch #go
GitHub - palner/fs-eventsocket: FreeSWITCH Event Socket library for the Go programming language.
FreeSWITCH Event Socket library for the Go programming language. - palner/fs-eventsocket
github.com
December 4, 2024 at 2:48 PM
Updated github.com/palner/fs-ev... with the ability to use "sendevent" with FreeSWITCH ESL. #freeswitch #go
See you at ClueCon2025! www.fredposner.com/going-to-clu...
See you at ClueCon 2025
Cluecon, a conference centered around FreeSWITCH, VoIP, and WebRTC, will be held in Chicago from August 4-7th, 2025. This year, I will present regarding migrating users from FreeSWITCH to registering ...
www.fredposner.com
July 30, 2025 at 7:38 PM
See you at ClueCon2025! www.fredposner.com/going-to-clu...
Did you know that #FreeSWITCH has an open hang out on Fridays? From 10am EST to 3pm EST (1500 - 2200 UTC) you can join as you want, hang out, or have someone to help with your FreeSWITCH (or SignalWire questions). via @briankwest.bsky.social
signalwire.sw.work/rooms/Signal...
signalwire.sw.work/rooms/Signal...
SignalWire | Work
SignalWire is a technology company providing advanced communications and developer tools.
signalwire.sw.work
February 14, 2025 at 2:10 PM
Did you know that #FreeSWITCH has an open hang out on Fridays? From 10am EST to 3pm EST (1500 - 2200 UTC) you can join as you want, hang out, or have someone to help with your FreeSWITCH (or SignalWire questions). via @briankwest.bsky.social
signalwire.sw.work/rooms/Signal...
signalwire.sw.work/rooms/Signal...
Wrote a new blog post recently about integrating Freeswitch with an AI agent.
If anyone’s interested, the link is below.
👇
If anyone’s interested, the link is below.
👇
November 21, 2025 at 12:55 PM
Wrote a new blog post recently about integrating Freeswitch with an AI agent.
If anyone’s interested, the link is below.
👇
If anyone’s interested, the link is below.
👇
Wow... this month's newsletter from @enablesecurity.bsky.social should not be ignored. I say it every month...
There are those who read what @sandrogauci.bsky.social writes, and those who wish they had.
#freeswitch #cisco #coturn #security #opensource
www.enablesecurity.com/newsletter/2...
There are those who read what @sandrogauci.bsky.social writes, and those who wish they had.
#freeswitch #cisco #coturn #security #opensource
www.enablesecurity.com/newsletter/2...
August 2026: FreeSWITCH RCE in the wild, coturn advisories verified, Hacker Summer Camp
FreeSWITCH servers taken over in the wild through api-chat and fixed in 1.11.3, what we found reproducing coturn's August advisory batch, the RTC and telecom research from Hacker Summer Camp, voice AI...
www.enablesecurity.com
August 31, 2026 at 8:39 PM
Wow... this month's newsletter from @enablesecurity.bsky.social should not be ignored. I say it every month...
There are those who read what @sandrogauci.bsky.social writes, and those who wish they had.
#freeswitch #cisco #coturn #security #opensource
www.enablesecurity.com/newsletter/2...
There are those who read what @sandrogauci.bsky.social writes, and those who wish they had.
#freeswitch #cisco #coturn #security #opensource
www.enablesecurity.com/newsletter/2...
El problema es que prácticamente cualquier compañía de VOIP admite configurar manualmente el ID de llamante en lugar de tomarlo del número de cabecera asociado. Freeswitch es un software freeware con el que puedes llamar o mandar sms haciéndote pasar por quien a ti te dé la gana a coste casi cero.
August 7, 2025 at 10:39 AM
El problema es que prácticamente cualquier compañía de VOIP admite configurar manualmente el ID de llamante en lugar de tomarlo del número de cabecera asociado. Freeswitch es un software freeware con el que puedes llamar o mandar sms haciéndote pasar por quien a ti te dé la gana a coste casi cero.
came across this thread in my for you feed - you articulated what i'd really like to as an evolution to discord for communities very well!
as to your earlier post about not being built for discord refugees... unfortunately, yeah, their team says as much in this issue github.com/element-hq/e...
as to your earlier post about not being built for discord refugees... unfortunately, yeah, their team says as much in this issue github.com/element-hq/e...
Push-to-talk in video/voice conferencing · Issue #5993 · element-hq/element-web
Whether it's Freeswitch or Jitsi (AFAIK Freeswitch is on the way out), having Push-To-Talk for channel chat would be seriously appreciated! Right now if you have a channel with a whole lot of peopl...
github.com
February 16, 2026 at 7:45 AM
came across this thread in my for you feed - you articulated what i'd really like to as an evolution to discord for communities very well!
as to your earlier post about not being built for discord refugees... unfortunately, yeah, their team says as much in this issue github.com/element-hq/e...
as to your earlier post about not being built for discord refugees... unfortunately, yeah, their team says as much in this issue github.com/element-hq/e...
My presentation from #ClueCon was posted on YouTube =) www.youtube.com/watch?v=7omz...
ClueCon 2025 | Fred Posner: Scaling & Moving User Registrations/Locations/Presence - FS to Kamailio
YouTube video by FreeSWITCH
www.youtube.com
September 5, 2025 at 6:32 PM
My presentation from #ClueCon was posted on YouTube =) www.youtube.com/watch?v=7omz...
So I used to reply to the FreeSWITCH mailing list if someone had an issue. I wouldn’t claim I’m an expert by any means, but if someone had a problem and I knew how to help, why not spend 5 minutes to reply?
🧵
🧵
April 17, 2025 at 4:23 PM
So I used to reply to the FreeSWITCH mailing list if someone had an issue. I wouldn’t claim I’m an expert by any means, but if someone had a problem and I knew how to help, why not spend 5 minutes to reply?
🧵
🧵
Was honored to chat with @miconda.bsky.social and Luca about #kamailio and #kamailioworld on ClueCon Weekly.
www.youtube.com/watch?v=czDp...
www.youtube.com/watch?v=czDp...
ClueCon Weekly with Daniel-Constantin & Fred Posner [Sn. 15 Ep. 21]: Kamailio 6.1
YouTube video by FreeSWITCH
www.youtube.com
January 30, 2026 at 4:04 PM
Was honored to chat with @miconda.bsky.social and Luca about #kamailio and #kamailioworld on ClueCon Weekly.
www.youtube.com/watch?v=czDp...
www.youtube.com/watch?v=czDp...
The vast amount of things I find answered by @nickvsnetworking.bsky.social never ceases to amaze me. Today's example... nickvsnetworking.com/freeswitch-k...
#freeswitch
#freeswitch
FreeSWITCH – Keep Call-ID the same on both legs of a Bridged Call | Nick vs Networking
https://nickvsnetworking.com/freeswitch-keep-call-id-the-same-on-both-legs-of-a-bridged-call/#:~:text=Menu-,FreeSWITCH%20–%20Keep%20Call%2DID%20the%20same%20on%20both%20legs%20of,'ve%20been%20a%20Tweet…
March 12, 2026 at 3:11 PM
The vast amount of things I find answered by @nickvsnetworking.bsky.social never ceases to amaze me. Today's example... nickvsnetworking.com/freeswitch-k...
#freeswitch
#freeswitch
Happy to announce that I just released updated Ubuntu 24.04 LTS packages for Kamailio, rtpengine and FreeSWITCH for anyone to use. You can use Docker to build the packages yourself.
github.com/ProVoice/pro...
github.com/ProVoice/pro...
github.com/ProVoice/pro...
github.com/ProVoice/pro...
github.com/ProVoice/pro...
github.com/ProVoice/pro...
Releases · ProVoice/provoice-build-kamailio
ProVoice packages build environment for Kamailio using Docker - ProVoice/provoice-build-kamailio
github.com
November 17, 2024 at 10:43 AM
Happy to announce that I just released updated Ubuntu 24.04 LTS packages for Kamailio, rtpengine and FreeSWITCH for anyone to use. You can use Docker to build the packages yourself.
github.com/ProVoice/pro...
github.com/ProVoice/pro...
github.com/ProVoice/pro...
github.com/ProVoice/pro...
github.com/ProVoice/pro...
github.com/ProVoice/pro...
I just upgraded Sofia-SIP to 1.13.18 on my FreeSWITCH installation. Compiled from source.
August 3, 2026 at 10:16 PM
I just upgraded Sofia-SIP to 1.13.18 on my FreeSWITCH installation. Compiled from source.
In which @miconda.bsky.social discusses #Kamailio World on ClueCon Weekly... and for some reason I am also there. =)
www.youtube.com/watch?v=XFYw...
#kamailioworld
www.youtube.com/watch?v=XFYw...
#kamailioworld
ClueConWeekly with Fred Posner and Daniel Constantin-Mierla [Ep. 22]
YouTube video by FreeSWITCH
www.youtube.com
February 12, 2025 at 7:37 PM
In which @miconda.bsky.social discusses #Kamailio World on ClueCon Weekly... and for some reason I am also there. =)
www.youtube.com/watch?v=XFYw...
#kamailioworld
www.youtube.com/watch?v=XFYw...
#kamailioworld
Flight/Hotel booked for #ClueCon -- see you in Chicago! www.cluecon.com
ClueCon Home
A conference for developers, by developers, created by the founders of the FreeSWITCH Open Source project. Learn how others are solving RTC challenges and discuss the future of telecom.
www.cluecon.com
June 18, 2025 at 2:15 AM
Flight/Hotel booked for #ClueCon -- see you in Chicago! www.cluecon.com
A New Day for Serious VoIP Developers #FusionPBX #FreeSWITCH #VoIP #NerdVittles
nerdvittles.com/a-new-advent...
nerdvittles.com/a-new-advent...
June 25, 2025 at 12:37 PM
A New Day for Serious VoIP Developers #FusionPBX #FreeSWITCH #VoIP #NerdVittles
nerdvittles.com/a-new-advent...
nerdvittles.com/a-new-advent...
Posted my presentation and slides from ClueCon 2024:
Kamailio and FreeSWITCH at Scale
www.fredposner.com/cluecon2024-...
Kamailio and FreeSWITCH at Scale
www.fredposner.com/cluecon2024-...
ClueCon 2024 Kamailio Presentation
My ClueCon 2024 Kamailio Presentation, Kamailio and FreeSWITCH at Scale, has been posted to YouTube.
www.fredposner.com
November 16, 2024 at 6:22 PM
Posted my presentation and slides from ClueCon 2024:
Kamailio and FreeSWITCH at Scale
www.fredposner.com/cluecon2024-...
Kamailio and FreeSWITCH at Scale
www.fredposner.com/cluecon2024-...
My interview about Amber-Lang for FreeSWITCH is online :-)
#opensource
https://www.youtube.com/watch?v=oGQg3FdSpXc
#opensource
https://www.youtube.com/watch?v=oGQg3FdSpXc
March 5, 2026 at 8:59 AM
My interview about Amber-Lang for FreeSWITCH is online :-)
#opensource
https://www.youtube.com/watch?v=oGQg3FdSpXc
#opensource
https://www.youtube.com/watch?v=oGQg3FdSpXc
Not on my bingo card for this week. Write a complete Testing Framework for FreeSwitch using ESL for Ruby
February 5, 2026 at 9:20 AM
Not on my bingo card for this week. Write a complete Testing Framework for FreeSwitch using ESL for Ruby
#API #Development #Backend #Development #FreeSwitch #JavaScript #Linux #Node.js #PHP #VoIP #Web
Origin | Interest | Match
FreeSwitch + Web App Development, Integration
PHP & Web Development Projects for ₹75000-150000 INR. I am building a web-based application whose core purpose is to let users place and receive voice calls directly in t
www.freelancer.com
October 13, 2025 at 6:21 PM
#API #Development #Backend #Development #FreeSwitch #JavaScript #Linux #Node.js #PHP #VoIP #Web
Origin | Interest | Match
P.S. On the other hand, I really miss the FreeSWITCH mailing list. It’s such a shame they decided to get rid of it.
April 17, 2025 at 4:23 PM
P.S. On the other hand, I really miss the FreeSWITCH mailing list. It’s such a shame they decided to get rid of it.
For the first time in years I have to modify our Freeswitch build and it reminds me how much C/C++ sucks.
Each build takes 4 friggin hours. 4 friggin hours!!!
Hey, @ChatGPTapp, build me a voice conferencing system to replace Freeswitch with JavaScript, please.
Each build takes 4 friggin hours. 4 friggin hours!!!
Hey, @ChatGPTapp, build me a voice conferencing system to replace Freeswitch with JavaScript, please.
December 6, 2024 at 1:23 PM
For the first time in years I have to modify our Freeswitch build and it reminds me how much C/C++ sucks.
Each build takes 4 friggin hours. 4 friggin hours!!!
Hey, @ChatGPTapp, build me a voice conferencing system to replace Freeswitch with JavaScript, please.
Each build takes 4 friggin hours. 4 friggin hours!!!
Hey, @ChatGPTapp, build me a voice conferencing system to replace Freeswitch with JavaScript, please.
I needed to work on one AI project today which was actually pretty neat. The idea is to send audio to ElevenLabs and live transcribe the call. I know how to handle the telephony part—it's easy—but I had some issues with the Node.js server that's acting as a proxy between ElevenLabs and FreeSWITCH
👇
👇
April 11, 2025 at 4:23 PM
I needed to work on one AI project today which was actually pretty neat. The idea is to send audio to ElevenLabs and live transcribe the call. I know how to handle the telephony part—it's easy—but I had some issues with the Node.js server that's acting as a proxy between ElevenLabs and FreeSWITCH
👇
👇