The ultimate guide to hiring a web developer in 2021
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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:
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!
From 24,096 reviews, clients rate our VoIP Developers 4.9 out of 5 stars.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:
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!
From 24,096 reviews, clients rate our VoIP Developers 4.9 out of 5 stars.I already have PacketFence installed and a Cisco 9800 wireless-LAN controller online; I just need a knowledgeable hand to finish the guest-access workflow. The scope is narrow: • Build a simple, branded guest user portal in PacketFence that pops up automatically on the 9800 WLAN. • Enable the device registration process so every new MAC is tracked. • Configure dual-step guest authentication: first e-mail verification, then a one-time-password. I have an SMTP server ready to relay the messages, so no new mail infrastructure is required. • Verify that the RADIUS flow, captive-portal redirect, and VLAN assignment work end-to-end for both 2.4 GHz and 5 GHz SSIDs. A brief walkthrough of the key screens or a small runbook will be the acceptance criteria; a short rem...
We are seeking an experienced professional to create a mirror or backup of our ASTPP server. This is a one-time project requiring expertise in server management and data integrity. ASTPP server 1 must be linked to ASTPP server 2, so that the DB of ASTPP server 2 has the same data as the DB of ASTPP server 1, both server DB's and from https interfaces. In case ASTPP 1 fails, it must not affect ASTPP 2 server and ASTPP 2 can become the main server. The same in case of mysql failure or corruption. MYSQL failture or corruption on one of those 2 server, must not affect the server number 2. Freelancer must carry out the task, then provide a detailed document on how to achieve the same result on any other 2 ASTPP servers. Someone from our side with limited technical knowledge will take the ...
I have just licensed Salesforce for my telecoms company and now need the environment configured so it actually mirrors the way we sell, provision, bill and support our services. The org is still vanilla, so the first step will be to map my customer lifecycle—lead, opportunity, order, service activation, ongoing support—and translate that into custom objects, fields, record types, flows and approval processes that make sense for a telecom operation. Data is scattered across spreadsheets and a legacy billing portal; I will export it for you, but I need it cleansed, deduped and migrated into Salesforce so every customer record is complete and reliable from day one. Once the data model is solid, I want dashboards and reports that give me real-time visibility into sales pipeline, c...
1- There will be a Lead Tab. inside this tab a) Bulk lead upload. b) Bulk upload to assigned admin staff c) Voip Call action d) lead status options e) convert to customer (user) button f) open Trader account ( manage manually, second step will api) g) this lead section will like zoho crm or espo crm structure Trade Account Tab a) Meta trader accounts ( this will manage api second step of project) b) Sirix accounts Report Tab a) assinged x staff called xxxx lead b) xxxx lead call status "busy", "completed" etc c) xxx customer deposited 3 times with xxx usd This project is a kind of Espocrm, zoho crm feature integration to a ready script ViserBank is a PHP Laravel-based Digital Banking Solution designed for those looking to launch a feature-rich banking website.
I have two VOIP call-detail-record files that are at the centre of a billing dispute and I need a clear, defensible comparison of them. The goal is to line up the calls in both files, calculate each side’s duration, and show me only the cases where those durations don’t agree. The final deliverable must be a single CSV file that I can forward to the carriers as evidence. Deliverables • A consolidated CSV that pairs matching calls, shows duration A vs. duration B, and includes both the raw difference and any percentage variance. • Only the calls with unmatched durations should be highlighted or extracted; fully matched records don’t need emphasis. • My two original CDRs returned untouched, plus any script, query, or workbook you build so I can rerun the...
I need a clean, reliable VoIP application whose core job is simple: high-quality voice calls on both Android and iOS. The app should register quickly, connect calls with minimal latency, and keep audio clear even on variable networks. I will supply the SIP account details and branding assets; you handle everything else—from choosing the most stable VoIP libraries (PJSIP, WebRTC, or equivalent) to publishing-ready builds for Google Play and the App Store. Deliverables must include: • Source code and build instructions for each platform • Release-ready APK and IPA (or TestFlight build) • Brief documentation covering third-party libraries, push notification setup, and any server configuration required If you have proven techniques for battery-friendly backg...
I run a growing home-care agency and need a reliable virtual assistant to keep our day-to-day operations running smoothly. Your core responsibilities will be threefold: • Appointment scheduling – you’ll coordinate caregiver visits and client consultations directly in Google Calendar, keeping times, reminders and any last-minute changes perfectly up to date. • Client record management – every interaction and service note must be logged in our shared Google Sheets database. Accuracy and an eye for detail are vital; these records guide staffing, invoicing, and compliance checks. • Phone coverage – during agreed blocks of time you’ll answer incoming calls, route urgent issues to me or on-call staff, and return routine inquiries with professionali...
I’m building a full-featured interpreting platform that lets our clients choose how they connect with language professionals—video, phone, or on-site—simply by speaking a request or using more traditional inputs. Scope • Three interpreting modes: virtual remote interpreting, over-the-phone interpreting, and onsite interpreter scheduling, all managed from the same interface. • Three interaction styles: voice commands for hands-free operation, plus keyboard/mouse and touchscreen for desktop and mobile users. • Role-based access: distinct dashboards for clients, interpreters, administrators, and an additional scheduler/project-manager role with permission controls. Core requirements 1. Integrate best-fit APIs for video conferencing, VoIP, and rea...
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....
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...
I’m looking for a Go-savvy FreeSWITCH specialist who can dive straight into a stubborn WebRTC issue that’s crippling call stability. The goal is simple: identify the root cause, patch it cleanly, and leave my stack handling WebRTC calls as smoothly as it does SIP. The platform is already live, written largely in Go, and the problem shows up under moderate load—call setup stalls or drops mid-stream whenever WebRTC endpoints join. I’ll grant you SSH access to the FreeSWITCH node, relevant Go modules, and recent logs so you can reproduce the fault. What I expect from you • A concise but detailed proposal outlining your troubleshooting plan, diagnostic tools you lean on (e.g., sngrep, fs_cli, Wireshark), and an estimated timeline. • Clean, well-commented...
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.
help us to setup already installed Fusionpbx, setting up routing and sip trunk
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...
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.
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...
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...
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...
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)...
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 ...
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...
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)...
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...
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...
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.
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
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...
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...
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
If you want to stay competitive in 2021, you need a high quality website. Learn how to hire the best possible web developer for your business fast.
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