
Closed
Posted
Paid on delivery
I’m running a 3CX instance that must handle call-center traffic in the United States, averaging somewhere between 10 and 50 concurrent calls. I don’t yet have a trunk provider lined up, so I need a VoIP specialist who can point me to a reliable US-based SIP trunk, supply the full configuration string, and make sure it registers cleanly inside 3CX. The trunk has to be stable under call-center loads, pass caller-ID correctly, and support normal 3CX features such as call recording and queue reporting. Codec compatibility (G.711 u/a-law at minimum) and solid failover are also important so our agents never lose a call. Deliverables • Shortlist of one-to-three US SIP providers that meet the above requirements, including price tiers for 10-50 channels • Exact trunk parameters (SIP server, outbound proxy if needed, authentication format, any special 3CX template tweaks) • A brief, step-by-step setup guide or screen-share session verifying successful registration and two-way audio If you’ve deployed 3CX with high-volume SIP trunks before, I’d love to see it working just as smoothly here.
Project ID: 39746184
15 proposals
Remote project
Active 7 mos ago
Set your budget and timeframe
Get paid for your work
Outline your proposal
It's free to sign up and bid on jobs
15 freelancers are bidding on average $149 USD for this job

With over a decade in the information technology and services industry, my experience is tailored perfectly for your 3CX SIP Trunk Setup project. My deep understanding of VoIP technologies coupled with my network and system engineering capabilities make me the ideal candidate to not only select a reliable US-based SIP trunk but also ensure seamless integration with your 3CX instance. I am adept at selecting and configuring network solutions that handle high call-center loads, in compliance with the exact specifications you outlined. Moreover, having worked with numerous vendors such as Cisco and Fortinet - two companies that heavily feature in your setup- I am familiar with their products and can ensure flawless compatibility, whether it's codec compliance or failover mechanisms. My expertise extends to not only design and implementation but also suggest improvements based on industry recommendations, which means, you'll not only get what you need, but also the best in class setup. Aside from my technical prowess, I pride myself in my round-the-clock availability which will ensure we meet the deadlines as per your schedule without any hindrances. So let's join hands to set up a stable US-based SIP trunk solution that's customized for your company and boosts its efficiency while handling concurrent calls robustly.
$200 USD in 4 days
6.9
6.9

Hi, I'm a VoIP specialist with extensive experience configuring 3CX with high-volume SIP trunks for call centers. I can help you set up a reliable US-based SIP trunk for your 10-50 concurrent call environment. My expertise includes selecting stable providers, configuring accurate trunk parameters (SIP server, proxy, authentication, etc.), and troubleshooting registration/audio issues. I'll deliver: * 1-3 US SIP provider recommendations (10-50 channel pricing included). * Precise trunk configuration strings tailored to 3CX. * A concise setup guide, or screen-share session for verification. I can start immediately. Let me ensure your 3CX handles call center traffic flawlessly. Thanks, Manoj
$250 USD in 1 day
6.5
6.5

As someone with a strong background in Linux and Telecommunications Engineering, I am well-equipped to navigate the intricacies of a project like yours. With over a decade of hands-on experience, I've set up numerous call-center specific SIP trunks in 3CX instances and can assure you that I understand the dependencies and priorities that come with managing high-volume traffic effectively and efficiently. My first-hand knowledge enables me to identify reliable, US-based SIP trunk providers within your budget that provide for necessary features such as call recording and queue reporting. Not only will I source suitable providers, but also supply you with the exact trunk parameters, including SIP server details, outbound proxies if needed, authentication formats and any special 3CX template tweaks required ensuring smooth functionality.
$140 USD in 7 days
4.7
4.7

Hi there,Good morning I am Talha. I have read you project details i saw you need help with SIP, VoIP, Linux, Cisco, Telecom Sales, Network Engineering, Asterisk PBX and Telecommunications Engineering I am pleased to present my proposal, highlighting our extensive experience and proven track record in delivering exceptional results. Our portfolio of success will showcase past projects that demonstrate our ability to meet and exceed client expectations. Glowing testimonials from satisfied clients will attest to our professionalism, dedication, and the quality of our work 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 in 13 days
3.4
3.4

Hi, how are you doing? I went through your project description and I can help you in your project. I have extensive experience as a Networking Developer. I specialize in programming languages such as Java and Python. I bring over 10+ years of experience in full-stack software development, specializing in Java, Spring Boot (spring-boot V3.5.0), REST APls, and scalable micro-services architecture. My expertise extends to databases like MySQL and PostgreSQL, DevOps tools like Docker and Kubernetes, and cloud platforms like AWS and GCP. I am proficient in web development technologies including HTML, JavaScript, CSS, and PHP. I have good expertise in Cisco Packet tracer. As Cisco Certified Network Professional (CCNP), we gained extensive experience in installing switches and routers. I possess an in-depth understanding of different elements of network setup such as VLANs, STP, and VTP which are crucial for neat and effective device connection. I have successfully completed 1000+ Projects for multiple regular clients from OMAN, UK, USA, Australia, Canada, France, Germany, Lebanon and many other countries. Feel free to text me so that we can further discuss your project in details. Thank You
$140 USD in 7 days
3.1
3.1

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 in 1 day
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 in 1 day
0.0
0.0

"I believe my skills align perfectly with your project needs. I specialize in VoIP and have experience setting up high-volume SIP trunks with 3CX. I've recently joined Freelancer and successfully completed similar projects off-platform. I focus on accuracy, reliability, and clear communication, ensuring smooth deployment and optimized call-center performance. The worst-case scenario is you walk away with a free consultation; best case, you gain a dependable partner. I'd love to chat to you about your project! Kind regards, Jayden Finch"
$200 USD in 30 days
0.0
0.0

Hi, I completely understand what you’re aiming for: a stable 3CX setup that can confidently handle 10–50 concurrent calls, with proper caller-ID, recording, and failover. The main challenge here isn’t just “getting it to register,” but making sure the trunk is optimized for call-center grade reliability so your agents never risk dropped calls or broken audio. Here’s how I’d approach it step by step: 1️⃣ Shortlist 2–3 trusted US SIP providers that fit your budget and support 10–50 channels. 2️⃣ Provide you with the exact configuration string (SIP server, proxy, authentication) and apply any 3CX template tweaks if required. 3️⃣ Run a guided setup (screen-share or documented steps) to ensure registration, two-way audio, and codec compatibility (G.711 minimum). 4️⃣ Stress-test the trunk to confirm stability under load and enable features like recording and queue reporting. I’ve worked on similar high-volume SIP deployments before, and I know how critical “smooth and invisible” performance is in a call-center environment. My goal is to make this setup worry-free for you, so you can focus on operations instead of troubleshooting. Would you like me to also include a cost comparison of the SIP providers so you can choose the most reliable + cost-effective option? Looking forward to making this a smooth experience for you!
$140 USD in 7 days
0.0
0.0

Hi, I would like to grab this opportunity and will work till you are 100% satisfied with your project. I have extensive experience setting up high-volume SIP trunks in 3CX instances, ensuring seamless call handling for call centers. I can recommend reliable US-based SIP providers, configure the trunk parameters accurately, and ensure smooth integration with 3CX features like call recording and queue reporting. I have tons of experience and have successfully completed similar projects. I would love to chat more about your project! Regards, Claude
$150 USD in 7 days
0.0
0.0

I am a 3CX Certified Engineer with proven deployments across the UK, South Africa, Nigeria, Kenya, and Uganda — including a large-scale setup handling 900 concurrent calls. I can help you select a reliable US SIP trunk provider, configure it inside 3CX, and ensure it supports all required features such as caller-ID, call recording, queue reporting, and failover stability. Deliverables will include: Shortlist of 1–3 US SIP providers with pricing for 10–50 channels Full configuration parameters (SIP server, authentication, template tweaks) A step-by-step setup guide or live session verifying registration and two-way audio With my experience in high-volume call centers, I’ll ensure your 3CX instance runs smoothly, reliably, and is ready to scale. Best regards, Rufftone Matata 3CX Certified Engineer
$200 USD in 5 days
0.0
0.0

San Jose, United States
Payment method verified
Member since Jul 29, 2025
$10-30 USD
$30-250 USD
$10-30 USD
$250-750 USD
$25-50 USD / hour
₹600-1500 INR
₹37500-75000 INR
$10-500 USD
₹150000-250000 INR
₹750-1250 INR / hour
$30-250 USD
$5000-10000 USD
$30-250 AUD
₹1500-12500 INR
₹12500-37500 INR
₹1500-12500 INR
₹1500-12500 INR
₹1500-12500 INR
$30-250 AUD
$30-250 USD
$2-8 AUD / hour
$100-170 USD
$10-30 USD