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We are looking for an experienced VoIP engineer to fix and finalize a SIP integration between FreePBX and ElevenLabs AI, with Twilio used for external PSTN calls. Please do not apply unless you have deep, hands-on experience with Asterisk 20, FreePBX 17, and PJSIP. Objectives (Must Be Achieved) Scenario 1 – Internal Test • Extension 1001 calls ElevenLabs AI via SIP • ElevenLabs processes the call • ElevenLabs transfers the call back to extension 1002 Scenario 2 – External Call • Call arrives from a Twilio number • Routed to FreePBX • Forwarded to ElevenLabs AI • AI transfers the call to a live PBX extension Both scenarios must be fully working and tested Current Environment • PBX: FreePBX 17 • Asterisk: 20.x • OS: Ubuntu 22.04 • Hosting: AWS EC2 • Signaling: PJSIP only • Transport tested: UDP / TCP (TLS optional) External Services • ElevenLabs SIP Trunk (Agent Voice / AVR)Current Issues (What Needs Fixing) • ElevenLabs SIP trunk shows: o Rejected o No auth objects matching realm • Calls connect but no audio • “All circuits are busy” after dialing • Unclear authentication behavior between PBX and ElevenLabs • Suspected RTP / NAT / media path issues • Need correct final configuration on: o FreePBX (GUI and Asterisk level) o ElevenLabs dashboard Required Skills (DO NOT APPLY WITHOUT THESE) • Experience with Asterisk and FreePBX • Deep PJSIP knowledge (endpoint, AOR, auth, identify) • SIP trunking with cloud AI / voice bots • RTP, NAT, and audio troubleshooting • AWS networking and security groups • Ability to read SIP traces, tcpdump, and pcap files • Twilio SIP and PSTN routing (strong bonus) Deliverables • Fully working PBX,ElevenLabs SIP integration • Both scenarios tested and confirmed • Final documentation covering: o SIP trunk configuration o Dialplan and call flow logic o ElevenLabs settings Optional (Nice to Have) • Security hardening and best-practice recommendations Time • Estimated time: 3–6 hours Important Notes • This is not a trial-and-error task • You must understand how ElevenLabs SIP trunking actually works • You must be comfortable working live on the server (SSH and FreePBX GUI) How to Apply (Required) Please include all of the following: 1. Previous Asterisk / FreePBX SIP trunk projects 2. Experience with AI voice agents or SIP bots 3. Confirmation that you can start immediately Applications without this information will be ignored Closing Please mention the word (ElevenLabs) at the beginning of your BID We are looking for one expert who knows exactly what they are doing, not multiple attempts. If successful, this can lead to ongoing VoIP and AI telephony work.
Proje No: 40058948
19 teklifler
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19 freelancer bu proje için ortalama $142 USD teklif veriyor

ElevenLabs, I can set up call forwarding through Asterisk PJSIP URI dialing, and for external calls, I can achieve this using a Twilio SIP Elastic Trunk.
$250 USD 7 gün içinde
6,7
6,7

Yes, we’ve successfully completed the same projects before and are confident we can deliver this one with the highest quality and within your timeline. We specialize in this type of work and would love to discuss your requirements in detail to ensure a smooth and timely delivery.
$250 USD 7 gün içinde
5,4
5,4

As an experienced VoIP engineer, I believe I possess the skills and expertise necessary to successfully complete your FreePBX and ElevenLabs SIP integration project. Over my expansive career, I have become well-versed in Asterisk 20, FreePBX 17, and PJSIP - crucial for this task. Not only can I meet the objectives of both internal testing and external calls, but I can also deliver a fully functional PBX system for both scenarios. Moreover, my proficiency in AWS networking and security groups will prove handy as you host on AWS EC2. I guarantee that your concerns about calls not connecting, audio issues, mysterious "all circuits are busy" message and confusing authentication behavior between PBX and ElevenLabs will be effectively resolved. With deep PJSIP knowledge in endpoints, AOR, auth, identify, coupled with RTP/NAT/audio troubleshooting skills, these dilemmas won't persist under my watch. I understand that this is a sensitive project that requires no trial-and-error approach. This is why my ability to read SIP traces, tcpdump, pcap flies combined with my previous experiences with Asterisk/FreePBX SIP projects and SIP trunking with AI voice agents like ElevenLabs make me the best fit for this project (ElevenLabs!). With me leading this project for you, count on quick turnaround time and quality delivery plus value as potential continued collaboration in AI telephony work.
$150 USD 3 gün içinde
4,3
4,3

Hi Storm, I am Sean, an AI & Full-Stack Developer with over 5 years of experience specializing in VoIP systems and cloud integrations, focusing on Asterisk, FreePBX, and PJSIP. I have successfully integrated FreePBX with various SIP trunks, ensuring seamless communication in complex scenarios. Given your project, my expertise aligns perfectly; I can resolve the SIP integration issues with ElevenLabs, ensuring both internal and external call scenarios operate flawlessly. I can do this project perfectly by addressing authentication challenges and troubleshooting RTP/NAT issues. I typically deliver this scope in 1 day, which includes thorough testing and documentation of the SIP trunk configuration and call flow logic. I prioritize clean code and thorough documentation to enhance security and clarity in all implementations. Let's get started on fixing the integration issues and bringing your telephony vision to life. Could you share any logs or specific error messages you're encountering with the current setup?
$250 USD 1 gün içinde
3,3
3,3

Hello, Thank you so much for posting this opportunity. It sounds like a great fit, and I’d love to be part of it! I’ve worked on similar projects before, and I’m confident I can bring real value to your project. I’m passionate about what I do and always aim to deliver work that’s not only high-quality but also makes things easier and smoother for my clients. Feel free to take a quick look at my profile to see some of the work I’ve done in the past. If it feels like a good match, I’d be happy to chat further about your project and how I can help bring it to life. I’m available to get started right away and will give this project my full attention from day one. Let’s connect and see how we can make this a success together! Looking forward to hearing from you soon. With Regards! Abhishek Saini
$250 USD 7 gün içinde
3,4
3,4

Hi there,Good morning I am Talha. I can work with your project skills Linux, VoIP, ElevenLabs, AI (Artificial Intelligence) HW/SW, Network Security, FreeSwitch, Asterisk PBX, Twilio and Telecommunications Engineering I am excited to present my proposal, which centers around a personalized approach designed to elevate your project. We will start with an in-depth consultation to gain a deep understanding of your project's unique requirements, goals, and constraints. Our commitment to customization means that we will tailor our services to align perfectly with your project, and we will explain how this approach will meet your expectations. Please note that the initial bid is an estimate, and the final quote will be provided after a thorough discussion of the project requirements or upon reviewing any detailed documentation you can share. Could you please share any available detailed documentation? I'm also open to further discussions to explore specific aspects of the project. Thanks Regards. Talha Ramzan
$30 USD 10 gün içinde
3,3
3,3

With over 57 successful projects in web development, fixing issues, performance enhancements, custom features, automation, and API integrations, I am confident in my ability to tackle your VoIP integration project. I have a proven track record of delivering high-quality solutions and positive reviews from satisfied clients. To address your SIP integration between FreePBX and ElevenLabs AI, I will approach the project in three actionable steps: 1. Conduct a thorough analysis of the current environment and identify the root causes of the issues. 2. Implement necessary fixes and optimizations to ensure seamless communication between FreePBX, ElevenLabs AI, and Twilio. 3. Test both internal and external call scenarios to confirm full functionality and provide detailed documentation for future reference. Let's discuss how I can help you achieve your objectives efficiently and effectively.
$100 USD 3 gün içinde
3,5
3,5

Hi, I read through your description and it seems more RTP related issue rather than SIP, seems proper codecs are not exchanged, do let me know for my support to resolve it, Thanks.
$140 USD 7 gün içinde
3,0
3,0

Dear . Thanks for sharing your project! I’ve worked on similar projects before and have hands-on experience with tasks like yours. I’ve got a bunch of hands-on experience with Network Security, VoIP, Linux, FreeSwitch, Asterisk PBX, AI (Artificial Intelligence) HW/SW, Twilio, Telecommunications Engineering and ElevenLabs, so I’m comfortable handling everything you’re looking for. If you want to see my work quality, please feel free to check my reviews from previous clients. I can also show examples of previous projects and walk you through my workflow, including clear communication, clean execution, and a professional approach from start to finish. Feel free to message me anytime. I’d be happy to discuss your project and get started. Best Regards, Huy.
$155 USD 4 gün içinde
0,0
0,0

My name is Rabia Faisal, I am working in the writing industry since 2011. During this time, I have served countless clients with a full amount of satisfaction by providing them with TOP Quality Solutions. I have command of all references APA, Harvard, IEEE, MLA & Chicago, etc. I will provide plagiarism-free work with 100 percent accurate grammar within your given deadline. Please message me to get Top Class Services. I am waiting; https://www.freelancer.com/u/TopWritingGuru
$30 USD 1 gün içinde
0,0
0,0

My name is "Usama Safdar" and I am a Ph.D degree holder which means I am highly-capable to tackle this project "Content Editor " with 100 percent accuracy. I am a professional writer with over 6 years of experience in writing; Essays, Research Summaries, Thesis, Dissertation, Lab Reports and Case Studies. I always provide High-Quality Solutions within the shortest possible time with all instructions followed against very reasonable prices. I can manage works even with shortest deadlines like; "2500 words work in just 6 Hours" with very reasonable time. As a pro academic writer I am also familiar with all the referencing styles; such as APA, Harvard, OSCOLA, IEE, MLA etc. I always provide plagiarism-free solutions and as a prove I also provide "FREE Turnitin reports". For Samples, please visit my profile https://www.freelancer.com/u/SolutionMart Please message me to start the discussion. Thank You
$30 USD 1 gün içinde
0,0
0,0

Hi, I fully understand the critical requirements for fixing and finalizing the SIP integration between FreePBX and ElevenLabs AI. With extensive hands-on experience in Asterisk 20 and FreePBX 17, I am confident in resolving the current issues related to SIP trunking, including authentication and audio problems. My approach will involve thorough troubleshooting of the RTP/NAT configurations to ensure seamless call flows for both internal and external scenarios. I will leverage my deep understanding of PJSIP, along with my capability to read SIP traces and tcpdump, to get both scenarios fully functional and tested within 3-6 hours. I aim to deliver a fully operational PBX integration, complete with comprehensive documentation of configurations and call flows. I can start immediately and am well-versed in security best practices as an optional enhancement. Best regards,
$155 USD 3 gün içinde
0,0
0,0

I was impressed by your project 'Fix FreePBX and ElevenLabs SIP Integration/Asterisk', it aligns perfectly with my skillsLinux, Asterisk PBX, VoIP, Telecommunications Engineering, FreeSwitch, AI (Artificial Intelligence) HW/SW, Twilio, Network Security, ElevenLabs in development. With over a decade of experience delivering 300+ successful projects and 200+ live apps on App Store and Play Store, I focus on building products that are clean, scalable, and results-driven. My approach is simple: understand your goals, plan precisely, and deliver a solution that exceeds expectations, on time and within scope. I maintain clear communication throughout the project to ensure transparency and collaboration. Let’s schedule a quick discussion to go over your requirements in detail and explore how I can help bring your vision to life.
$30 USD 7 gün içinde
0,0
0,0

Hi there, I’m excited to express my confidence in addressing the SIP integration issues you're facing with FreePBX and ElevenLabs AI. Having extensive experience with Asterisk 20, FreePBX 17, and deep knowledge of PJSIP, I can expertly troubleshoot and finalize your setup. I understand the nuances of working with SIP trunks and the challenges you've highlighted, such as dealing with rejected calls, audio issues, and NAT configurations. My approach includes thoroughly investigating your current environment, resolving the authentication problems, and ensuring both internal and external call scenarios function seamlessly. I will deliver a fully functioning PBX and ElevenLabs SIP integration along with comprehensive documentation of all configurations and call flows. I can start immediately and anticipate completing this task within 3-6 hours. What are your current priorities for the integration, and are there any specific deadlines I should be aware of? Thanks, Richard
$200 USD 2 gün içinde
0,0
0,0

ElevenLabs Hi Storm, I’m Larasati, a VoIP engineer with hands-on experience in Asterisk 20, FreePBX 17, and PJSIP. Fixing and finalizing a FreePBX–ElevenLabs SIP integration with Twilio for PSTN is right in my wheelhouse. Fix FreePBX and ElevenLabs SIP Integration/Asterisk is a project I can approach with a clear, engineering-driven mindset. I’ve worked on similar systems before and I understand how to design a clean, reliable solution from start to finish. From your description, here’s how I would approach it: 1. Clarify data sources, constraints, and required outputs; audit ElevenLabs auth/realm, endpoint usage, and media path for RTP. 2. Build a stable backend workflow with logging, retries, and fault tolerance; configure PJSIP endpoints (AORs, identify, auth) and FreePBX dialplan to route through ElevenLabs. 3. Implement clean, maintainable modules for SIP trunking, AI logic, and call routing; verify NAT traversal and AWS security groups. 4. Fully test both scenarios, produce final documentation (SIP trunk, dialplan, ElevenLabs settings), and a safe rollback plan. clientQuestion_here Looking forward to discussing more. Do you prefer TLS for SIP between FreePBX and ElevenLabs, and what NAT traversal strategy should we enforce in AWS (STUN/TURN or direct RTP)? Best regards, Larasati
$125 USD 3 gün içinde
0,0
0,0

KOGARAH, Australia
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Mar 25, 2006 tarihinden bu yana üye
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