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My broadcast phone system has suddenly stopped getting answers back from Telnyx. Calls leave the server but never receive the 200 OK, so nothing connects. I have already opened a ticket with Telnyx support, yet the problem persists. Everything points to a mis-configured SIP trunk on the Telnyx side, though I also see permission-related errors when the application hits their API. I need someone who understands Telnyx inside out—SIP trunk provisioning, outbound/inbound call routing, API key scopes, webhooks, the works—to dive in, locate the exact fault, and bring the service back online. Acceptance criteria • Root cause identified and explained clearly. • SIP trunk and any API permission issues resolved. • Test calls (outbound and inbound) complete successfully with normal call quality. • A short, step-by-step summary of the fix supplied so I can reproduce it if needed. You will receive full portal access, server logs, and SSH if required. Let me know your experience with Telnyx (or similar providers) and how quickly you can start.
Project ID: 40434712
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10 freelancers are bidding on average $26 USD for this job

I understand that you're experiencing a critical issue with your broadcast phone system and time is of the essence. My name is Farooq, and I've been working in the Network, Voice over IP (VoIP), and System Engineering field for over a decade. With my comprehensive experience in using various VoIP platforms, including Asterisk, Cisco CUCM, CME, FreePBX, Vodia, and 3CX, I am confident that I can quickly troubleshoot the problem and get your Telnyx calls back on track. Over the years, I've dealt with numerous infrastructure challenges - from network administration (routing, switching, VPNs) to security (Cisco ASA, Fortinet, Palo Alto) as well as virtualization (VMware and Microsoft HyperV), among others - which have sharpened my ability to identify root causes and devise effective solutions. What sets me apart is not just my hands-on experience with prominent vendors like those you use but also my in-depth understanding of how these systems integrate to form a complete network. My commitment to best practices ensures a meticulous approach to your project that will deliver not just a fix but also a clearly-documented solution for any future hitches. Providing exceptional service within set deadlines is one of the features of my work ethics and I look forward to applying these qualities to your project.
$30 USD in 2 days
7.1
7.1

Dear Client, Hello There! I’m Md Toriqul Islam, and I’m excited to partner with you & I can dive into your project immediately. I’m an experienced VoIP and backend developer specializing in SIP trunk configuration, Telnyx integration, API troubleshooting, and server-side communication systems with strong experience resolving real-time telephony issues. I understand you need to diagnose why your broadcast system is not receiving Telnyx 200 OK responses and resolve SIP trunk plus API permission problems. I’ve handled similar VoIP, webhook, routing, and authentication issues involving Telnyx and comparable providers successfully. I am skilled in SIP, Telnyx API, VoIP routing, webhook debugging, Linux server management, SSH troubleshooting, and network diagnostics. I’m ready to start immediately and would be happy to discuss this project. Looking forward to hearing from you. Best regards, Md Toriqul Islam
$20 USD in 2 days
4.7
4.7

Hey , I am a senior developer with 20 years of software development experience with skills including Linux, API, VoIP, Testing / QA, Troubleshooting, Asterisk PBX, SIP and API Integration. I have worked on a wide range of projects including mobile applications, backend systems, API integrations, automation tools, and cloud-based solutions. I focus on building stable, scalable, and maintainable software with clean architecture and strong attention to detail. I am comfortable working independently, communicating clearly, and delivering reliable results on time. I would be happy to discuss your project requirements and contribute my experience to help achieve your goals. Best regards
$25 USD in 3 days
1.4
1.4

As a seasoned web developer with extensive experience in working with APIs, system integrations, and Linux environments, I am equipped to swiftly and effectively tackle the challenges that arise when dealing with telephony systems like Telnyx. In my years of handling complex systems, I've come across diverse API integration scenarios such as yours, which makes me adept at quickly identifying and resolving permission-related errors. My grasp of API key scopes, webhooks and troubleshooting SIP trunking issues will prove invaluable for your project. Drawing from my proficiency in JavaScript, Node.js, and PHP which honed my ability to work with RESTful APIs, I believe I can provide robust resolution for your malfunctioning Telnyx issue. Moreover, my experience deploying AI and machine learning solutions including OpenAI can facilitate a comprehensive assessment of your server logs to track down the exact root cause of the problem. Overall, you can rely on me to not only decipher and repair any abnormalities plaguing your Telnyx setup but also document the process thoroughly. This will ensure your team is empowered to reproduce the fix if needed in the future. I'm eager to lend my skills and restore efficient connections for your broadcast phone system. Let's get started without delay!
$20 USD in 7 days
0.6
0.6

The absence of 200 OK responses in your broadcast phone system likely stems from a misconfigured SIP trunk on the Telnyx side, compounded by API permission errors. A meticulous examination of the SIP settings and API key scopes is essential to diagnose the core issues. With extensive experience in VoIP and Telnyx integrations, I will identify the root cause, rectify the SIP trunk and API settings, and ensure both outbound and inbound test calls function seamlessly. I can deliver this initial assessment within 3 days, complete with a step-by-step guide for future reference. Quick question: what's the one thing that needs to work perfectly on day one?
$14 USD in 3 days
0.1
0.1

Hi, I can fix your Telnyx call failure exactly as specified, focused on restoring SIP signaling, resolving API permission issues, and getting calls connecting reliably. I’ve debugged VoIP systems with Telnyx and SIP stacks (Asterisk/FreeSWITCH), tracing issues like missing 200 OK, trunk misconfigurations, and auth/permission errors. I’ll start by analyzing your SIP flow (INVITE → 100/180 → 200 OK) using server logs and packet traces to pinpoint where the handshake breaks. I’ll verify trunk settings (auth, IP ACLs, codecs, NAT, routing) and fix any misconfiguration on Telnyx or your server. I’ll also review API usage—key scopes, endpoints, and webhook handling—to resolve permission errors and ensure proper call control events. Then I’ll run full tests (outbound/inbound), confirm stable connections and audio quality, and validate signaling end-to-end. You’ll receive: • Clear root-cause explanation • Fixed SIP trunk + API config • Successful test calls • Step-by-step summary to reproduce the setup You’ll get your calling system fully operational again. Ready to start immediately. Agustin
$50 USD in 1 day
0.0
0.0

Drawing from 12 years of broad experience in backend and frontend development, I’m offering my unique problem-solving skills and knowledge of Linux and API integrations to swiftly address your Telnyx call failure. Understanding the depth of your concern and having worked with providers like Telnyx in the past, I’ll take a thorough approach to resolve all issues whether related to SIP trunk provisioning, inbound/outbound call routing, API key scopes or permissions. My competence with similar technologies used by Telnyx, such as Hugging Face, TensorFlow, Pytorch, scikit-learn and Keras, will facilitate not just the identification of root cause but also its clear explanation. Additionally, I can ensure that test calls are thoroughly conducted for both outbound and inbound cases to guarantee smooth functioning as well as provide a comprehensive step-by-step fix summary for future reference. Permit me the opportunity to implement my agile methodology expertise supplemented by an array of technical proficiencies in Python, JavaScript, jQuery, Bootstrap, React among others – on this project. Looking forward to contributing my skills towards bringing your broadcast phone system back online and operating optimally again.
$20 USD in 7 days
0.0
0.0

Root cause issues with Telnyx SIP/API failures usually sit in auth scopes, webhook routing, or trunk ACL mismatches. I’ve debugged similar VoIP cases where calls were leaving but never completing due to missing SIP responses or broken event callbacks between PBX and provider layer. Handled Asterisk + SIP trunk incidents involving call state mismatch and API permission drift, where fixes required aligning trunk config, correcting webhook retries, and validating outbound headers under real call flow. Approach is to isolate SIP signaling first (INVITE → 100/180 → 200 OK flow), then verify Telnyx portal trunk config + API key scopes, and finally replay test calls while logging full SIP traces to pinpoint where ACK/200 is being dropped. Quick question: are you using Mission Control Portal trunking or legacy SIP Connection, and do you have SIP trace logs from a failed call session?
$30 USD in 7 days
0.0
0.0

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