VoIP, otherwise known as Voice over Internet Protocol, is a digital solution for telecommunication that utilizes the transmission of voice through the use of data over the internet. This technology is typically adopted for both commercial and privately used applications. VoIP developers specialize in programming telecommunication systems using data transmission to provide efficient services for audio and video functions.

VoIP developers are highly sought after professionals as they can create a versatile and advanced system for both desktop and mobile devices. This can include creating a more interactive experience for customers with multi-way calls, conference calls, video conferencing and voicemail systems. VoIP developers can set up your business’s phone system such as forwarding calls remotely to other devices with extensions or even communicating with customers utilizing software like Callcentric, Flowroute or Voxbone.

Here's some projects that our expert VoIP Developer made real:

  • Secured and configured private networks by implementing security measures like IP SLA, NAT and ACLs
  • Integrating SIP trunks between billing platforms, PBXs and VoIP applications
  • Setting up Postfix mail server on Linux systems with TLS authentication and encryption
  • Installing and configuring sip telephony software like ASTPP into businesses
  • Developing web applications that can send and receive SMS messages utilizing VoIP APIs

Our expert VoIP Developer have created numerous projects to help business owners manage their telecommunications in a professional bet. Our developer have an array of experience in creating a secure and reliable system customized to each client demands. If you're looking to improve or create your business’ communication system, then post your project today on Freelancer.com to hire one of our skilled professional VoIP Developers today!

Da 24,036 valutazioni, i clienti danno una valutazione ai nostri VoIP Developers di 4.9 stelle su 5
Assumi VoIP Developers

VoIP, otherwise known as Voice over Internet Protocol, is a digital solution for telecommunication that utilizes the transmission of voice through the use of data over the internet. This technology is typically adopted for both commercial and privately used applications. VoIP developers specialize in programming telecommunication systems using data transmission to provide efficient services for audio and video functions.

VoIP developers are highly sought after professionals as they can create a versatile and advanced system for both desktop and mobile devices. This can include creating a more interactive experience for customers with multi-way calls, conference calls, video conferencing and voicemail systems. VoIP developers can set up your business’s phone system such as forwarding calls remotely to other devices with extensions or even communicating with customers utilizing software like Callcentric, Flowroute or Voxbone.

Here's some projects that our expert VoIP Developer made real:

  • Secured and configured private networks by implementing security measures like IP SLA, NAT and ACLs
  • Integrating SIP trunks between billing platforms, PBXs and VoIP applications
  • Setting up Postfix mail server on Linux systems with TLS authentication and encryption
  • Installing and configuring sip telephony software like ASTPP into businesses
  • Developing web applications that can send and receive SMS messages utilizing VoIP APIs

Our expert VoIP Developer have created numerous projects to help business owners manage their telecommunications in a professional bet. Our developer have an array of experience in creating a secure and reliable system customized to each client demands. If you're looking to improve or create your business’ communication system, then post your project today on Freelancer.com to hire one of our skilled professional VoIP Developers today!

Da 24,036 valutazioni, i clienti danno una valutazione ai nostri VoIP Developers di 4.9 stelle su 5
Assumi VoIP Developers

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    25 lavori trovati

    Project Title: AI Voice Survey Integration with VICIdial (Open-Source, No Per-Minute Cost, Using LLaMA + Whisper + Coqui) Description: I want to integrate an AI voice survey system directly with my VICIdial server. Instead of routing outbound calls to live agents, the calls should connect (via SIP URI) to an AI voice server that conducts the entire survey automatically. The AI should receive lead details (customer name, phone number, etc.) from VICIdial in real time, ask dynamic questions, understand responses, record and transcribe the full call, and then automatically dispose the lead in VICIdial based on the customer’s answer (e.g., Interested, Not Interested, Busy, etc.). Main Requirements: Integrate VICIdial outbound calls with AI voice server using SIP. Send real-time lead...

    €68 Average bid
    €68 Offerta media
    2 offerte

    I need FS switches configured primarily for network segmentation. The setup will involve configuring between 1 to 5 FS switches. These switches will connect to servers and other network switches. We have a leaf and spine setup for network access and San to server access. We continue to drop connections between the SAN and server and need help troubleshooting why that is happening.

    €24 / hr Average bid
    €24 / hr Offerta media
    23 offerte
    Help setup Fusionpbx & SIP
    6 giorni left
    Verificato

    help us to setup already installed Fusionpbx, setting up routing and sip trunk

    €18 / hr Average bid
    €18 / hr Offerta media
    26 offerte

    Our live technical-support call platform is ready for its first Arabic trial, and I need a native-level translator to put it through its paces right away. You will join several real-time support calls through our web interface, translate between English and Arabic on the fly, and take notes on how the system behaves. During each session please pay close attention to three things: overall voice clarity, how accurately your words are rendered at both ends, and whether the audio or interface shows any signs of instability. The calls are technical-support scenarios, so you should feel comfortable with basic IT vocabulary while you translate. Turnaround is urgent; I’d like the full round of tests and feedback completed as soon as possible—ideally within 24 hours of contract start....

    €243 Average bid
    Locale
    €243 Offerta media
    1 offerte

    Project Title: AI Voice Survey Integration with VICIdial (Open-Source, No Per-Minute Cost, Using LLaMA + Whisper + Coqui) Description: I want to integrate an AI voice survey system directly with my VICIdial server. Instead of routing outbound calls to live agents, the calls should connect (via SIP URI) to an AI voice server that conducts the entire survey automatically. The AI should receive lead details (customer name, phone number, etc.) from VICIdial in real time, ask dynamic questions, understand responses, record and transcribe the full call, and then automatically dispose the lead in VICIdial based on the customer’s answer (e.g., Interested, Not Interested, Busy, etc.). Main Requirements: Integrate VICIdial outbound calls with AI voice server using SIP. Send real-time lead...

    €277 Average bid
    €277 Offerta media
    14 offerte

    I need a fully-verified Twilio account that is already upgraded so I can start placing voice calls immediately. Please hand over the credentials, or transfer a sub-account, within my USD 100 ceiling. Once the account is in my name, set up a simple IVR: when callers dial in they should hear one prompt that routes them to Customer Support. No other branches are required for now. Deliverables: • Upgraded, voice-enabled Twilio account transferred to me • IVR configured with a single “Customer Support” option • Brief walkthrough (video or screenshots) showing where to modify the greeting and the forwarding number I will test by placing a live call; if it reaches the Customer Support line without errors, the job is complete.

    €155 Average bid
    €155 Offerta media
    21 offerte

    I need two fully-operational SIP trunks—one for Poland and one for the United Kingdom—set up as quickly as possible. Each trunk must support both inbound and outbound traffic. I’m starting from scratch with no existing VoIP provider, so you are free to source and provision the most reliable carrier that meets these requirements: • Local Polish and UK DIDs with proper caller-ID presentation • G.711 and, ideally, G.729 codecs • TLS/SRTP or similar secure transport options • Smooth integration with common PBX platforms such as FreePBX or 3CX Scope of work 1. Recommend and acquire the best-fit carrier(s). 2. Provision the trunks and obtain registration credentials. 3. Conduct test calls in both directions to verify audio, DTMF, an...

    €418 Average bid
    €418 Offerta media
    14 offerte

    יש לי שרת ‎Asterisk‎ פעיל שכבר משתמש בקריאות הישנות של ‎OpenAI‎. כעת אני צריך לשדרג אותו למימוש ‎Realtime API‎ כדי לאפשר צ'אט בזמן אמת. המטרה ברורה: לקבל תגובות זורמות (streaming) באופן מיידי, בלי לפגוע בשירותי הטלפון שכבר עובדים. מה העבודה כוללת • החלפת או הרחבת הקריאות הקיימות כך שיתמכו ב-streaming דרך ‎WebSocket‎/HTTP Streaming. • שמירת הלוגיקה העסקית וה-endpoints הנוכחיים של המערכת. • אופטימיזציה לחביון נמוך ויציבות קו. • בדיקה על סביבת staging ולאחר מכן פריסה ל-production. • מסירה של קוד מעודכן + הוראות התקנה ותיעוד קצר. קריטריוני קבלה 1. הודעת טקסט שמגיעה לשרת מחזירה תשובת מודל בזמן אמת ללא דיליי מורגש. 2. שום שירות קיים לא נשבר. 3. כל הקוד מגובה בגיט ומדגים בבירור איך לחבר, לבנות ולהפעיל. יש לי גישה מלא...

    €155 Average bid
    €155 Offerta media
    20 offerte

    Implement integration of SIP telephony with voice AI agent for handling incoming/outgoing calls through Asterisk or alternative Initial Data Telecommunication operator: TBD Telephony server: Asterisk (Linux VPS/server, dedicated IP) Task: automatic call handling through AI agent in real time. Main Tasks 1. Connecting SIP Trunk Configure Asterisk or similar Check routing of outgoing calls. Self-assembly (STT + LLM + TTS) Use a fast engine for STT (for example, Deepgram, Google Speech-to-Text, AssemblyAI). Dialogue logic on GPT (OpenAI) Speech synthesis via Deepgram TTS, Google TTS, Microsoft Azure TTS. Ensure audio streaming to minimize latency (practically in real time). 3. Functional Requirements Automatic response to incoming calls by the voice agent. Scenario behavior capab...

    €631 Average bid
    €631 Offerta media
    18 offerte

    I need a fluent English speaker to place outbound calls to small businesses across the United States and lock in qualified appointments for my website design service. Your goal is straightforward: secure a time on my calendar with the decision-maker and briefly introduce our custom website design offering. Pay structure is simple and performance-driven: • $15 for every confirmed appointment. • An extra $50 when that appointment converts into a sale. What I provide: • A concise value proposition for our website design. • Basic lead details to get you started. What you bring: • Proven experience in appointment setting or cold calling. • Clear, confident American-friendly phone presence. • Your own calling setup (dialer, VoIP, headset)...

    €22 Average bid
    €22 Offerta media
    7 offerte

    I want a single Poland DID sourced strictly from Telnyx—no substitute carriers—linked to a brand-new 3CX installation. The number only needs to handle voice calls; SMS or fax features are unnecessary. Here’s what I expect from you: • Secure and activate one Polish Telnyx DID in my own Telnyx account. • Provide the SIP trunk details and verify two-way voice connectivity. • Deploy a fresh 3CX instance (latest stable build), add the Telnyx trunk, and create at least one extension so I can answer and place calls. • Prove the setup works via test inbound and outbound calls, with clear audio and the correct caller ID. • Hand over any configuration notes or credentials required for me to maintain the system. I’ll release the agreed-upon ...

    €142 Average bid
    €142 Offerta media
    18 offerte

    I’m purchasing a brand-new Yarbo Yard robot and want the entire setup handled professionally once it arrives at my home. The scope covers both hardware assembly and software installation. Here’s what I need: • Unbox and fully assemble every module, dock, and accessory following the Yarbo guidelines. • Install or update the firmware, connect the robot to my Wi-Fi and the Yarbo companion app, and verify that sensors, GPS, and boundary functions are calibrated. • Run a live test to confirm mowing, obstacle detection, and return-to-dock features work flawlessly. • Provide a brief walkthrough so I understand daily operation, scheduling, and basic troubleshooting. I’ve already arranged to purchase the unit myself; it will be on-site and ready for you...

    €388 Average bid
    €388 Offerta media
    39 offerte

    I need a fluent English speaker to place outbound calls to small businesses across the United States and lock in qualified appointments for my website design service. Your goal is straightforward: secure a time on my calendar with the decision-maker and briefly introduce our custom website design offering. Pay structure is simple and performance-driven: • $15 for every confirmed appointment. • An extra $50 when that appointment converts into a sale. What I provide: • A concise value proposition for our website design. • Basic lead details to get you started. What you bring: • Proven experience in appointment setting or cold calling. • Clear, confident American-friendly phone presence. • Your own calling setup (dialer, VoIP, headset)...

    €24 Average bid
    €24 Offerta media
    4 offerte

    Implement integration of SIP telephony with voice AI agent for handling incoming/outgoing calls through Asterisk or alternative Initial Data Telecommunication operator: TBD Telephony server: Asterisk (Linux VPS/server, dedicated IP) Task: automatic call handling through AI agent in real time. Main Tasks 1. Connecting SIP Trunk Configure Asterisk or similar Check routing of outgoing calls. Self-assembly (STT + LLM + TTS) Use a fast engine for STT (for example, Deepgram, Google Speech-to-Text, AssemblyAI). Dialogue logic on GPT (OpenAI) Speech synthesis via Deepgram TTS, Google TTS, Microsoft Azure TTS. Ensure audio streaming to minimize latency (practically in real time). 3. Functional Requirements Automatic response to incoming calls by the voice agent. Scenario behavior capab...

    €648 - €1296
    Sigillata
    €648 - €1296
    25 offerte

    I’m ready to stand up a brand-new phone environment inside CallTrackingMetrics and need a pro who can get everything configured quickly and cleanly. The goal is straightforward: turn my CTM account into a fully working VoIP system that supports call forwarding, voicemail, and video conferencing from day one. Here’s what the job entails: • Activate and configure the VoIP lines inside my existing CallTrackingMetrics account. • Map out call flows so inbound calls route through the correct forwarding logic and voicemail greetings. • Enable and test the native video-conferencing feature set, ensuring it launches smoothly from both desktop and mobile. • Verify audio quality, caller ID, and failover rules so nothing slips through the cracks. • Provide...

    €389 Average bid
    €389 Offerta media
    11 offerte
    Centerfy Setup
    3 giorni left
    Verificato

    My Centerfy workspace is already open within GoHighLevel. I need someone familiar with the platform to complete the initial configuration, including testing outbound voice calling and potentially assisting with account management regularly. First, you will audit the current settings, connect all the relevant social channels, organize folders, tags, and user roles, and build a clean content calendar and automation with text messaging. Primarily, I want to ensure that the outbound and inbound calling are working properly and that the AI text response is functioning correctly.

    €375 Average bid
    €375 Offerta media
    72 offerte
    Cisco UC320W Setup
    3 giorni left
    Verificato

    I need help installing and configuring the Cisco UC320W phone system for 1-10 users. I can manage some of the setup but will need partial assistance. Key requirements include: - Install and configure the UC320W system - Set up basic functions: voicemail, call forwarding, conference calling - Provide some network setup assistance Ideal skills and experience: - Cisco UC320W expertise - VoIP configuration - Networking knowledge

    €402 Average bid
    €402 Offerta media
    32 offerte
    EST Outbound Sales & Email
    2 giorni left
    Verificato

    Operating 9:00 a.m.–6:00 p.m. Eastern, the sales desk engages small-business prospects across the U.S. The role centers on three concrete actions: 1. Place high-volume outbound calls through our CRM, confirm decision-makers, and lock in demos or discovery calls on the calendar. 2. Launch follow-up and nurture email sequences from the same platform to keep leads warm. 3. Record every touchpoint, note, and status change accurately inside the CRM. Daily success is measured by qualified appointments set and the cleanliness of data left in the system. Tools, lists, dialer, and templates are fully embedded in the CRM; a reliable internet connection and a headset are the only technical requirements. Fluency in English, a confident phone presence, and proven results selling to...

    €5 / hr Average bid
    €5 / hr Offerta media
    43 offerte

    requiero tomar todas las llamdas que no son contestadas en mi serv y enviarles un sms automatizado, la parte del envio ya la tengo pero nececito que al temrinar una llamada tome el numero, la ext y le envie los datos a la central que tengo de envio de sms

    €130 Average bid
    €130 Offerta media
    33 offerte

    I need an experienced networking professional to help me upgrade my home-office internet speed plan so I can work remotely without interruptions. Here’s what I’m looking for: • Assess my current ISP package and identify higher-speed options available at my address. • Compare plan tiers, contract terms, and true-to-advertised speeds so I know exactly what I’m paying for. • Advise on any account changes or scheduling steps needed with the provider, then guide me through the upgrade request. • Once the new plan is active, run before-and-after speed tests, latency checks, and reliability monitoring to confirm performance meets remote-work standards (video calls, large file transfers, VPN). • Fine-tune modem or router settings if re...

    €44 / hr Average bid
    Locale
    €44 / hr Offerta media
    13 offerte

    I’m looking for a specialist to put together a simple, always-on customer contact center that can handle day-to-day support without me needing to sit in front of a screen. The core focus is customer support delivered through three channels—phone calls, emails, and live chat—and I need each channel connected to the same backend so agents (and the automation) see a single view of every conversation. Here’s what I want at this stage: • A basic blueprint of the server stack, SIP/VoIP telephone lines, and any cloud services we’ll use. • Initial configuration that lets incoming calls, emails, and chat messages trigger automated replies for FAQs, order-status updates, or appointment scheduling, with smooth handoff to a live agent when needed. • Cl...

    €456 Average bid
    €456 Offerta media
    66 offerte
    Solar Battery Setup Expert Needed
    1 giorno left
    Verificato

    I'm looking for an experienced solar system technician to assist with a G@ HYB-5KW.1.1 QCell system. The batteries in my system are charging slowly and have never fully charged. Ideal skills and experience: - Expertise in solar batteries, particularly with G@ and QCell systems - Experience troubleshooting charging issues - Ability to check wiring and connections - Familiarity with system firmware updates Please provide a detailed plan of action and your relevant experience.

    €29 / hr Average bid
    Locale
    €29 / hr Offerta media
    5 offerte

    I’m looking for a U.S.–based collaborator who can answer and return technical support calls for our team and do so with calm, professional confidence. When a customer rings in, you’ll greet them in clear, friendly American English, listen carefully, and gather the key facts of their issue. If it’s a simple question you can resolve on the spot, great—walk them through the steps. Otherwise, log a concise summary of the conversation and pass it to our engineers for deeper investigation. You’ll use our cloud phone system (or your own U.S. number if you prefer) and update each interaction in a shared ticket board so everyone can see the latest status. Typical tasks include: • Answering incoming technical support calls during standard U.S. business hour...

    €100 Average bid
    €100 Offerta media
    11 offerte

    I need a confident, clear-spoken caller to spend five focused hours each weekday reaching out to medium-sized businesses on our supplied lead lists. Your sole mission is to secure qualified discovery meetings for our cybersecurity team; every conversation should end with either a booked calendar slot or a clear follow-up path. To make this straightforward, I’ll give you: • a proven script and objection-handling sheet • a VoIP dialer and CRM login (all cloud-based) • daily contact lists, refreshed each morning During each call you’ll confirm the decision maker’s name, direct contact details, and—most importantly—whether they are open to meeting with us to explore working together. Log every outcome in the CRM before clocking out so we can...

    €11 / hr Average bid
    €11 / hr Offerta media
    12 offerte

    Professional Call Agent (UK / Irish / American Accent) – Business Lead Follow-Up & Demo Booking ⸻ Description: We are an automation and AI systems agency seeking professional call agents to contact verified business leads and schedule short demo appointments. We already have lists of business owners and verified numbers (B2B). Your job will be to call, introduce our company, and book them for a demo call with our sales director. This is not cold selling — these are warm or pre-qualified leads who already showed interest or were pre-screened. ⸻ Responsibilities: • Call business owners using our provided list and call scripts • Introduce our company and briefly explain our services (AI automation, workflow systems, chatbots, etc.) • Book confirmed dem...

    €536 Average bid
    €536 Offerta media
    25 offerte

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