You will get FreeSWITCH / Asterisk PBX Or Vicidial Or FusionPBX or FreePBX Setup
Project details
We are excited to offer a versatile call center solution designed to meet your business needs. Whether you require a full-scale system or prefer a flexible monthly usage plan for agents, our solution has you covered. Here’s what you can expect:
Campaign Management: Efficiently handle inbound and outbound campaigns with robust tools for setup and management.
IVR (Interactive Voice Response): Customize your IVR setup and manage voice messages to enhance customer interactions.
Reporting: Access real-time live reporting and detailed insights for both inbound and outbound calls.
DID Management: Simplify the management of Direct Inward Dialing (DID) numbers and bulk uploads.
SIP Trunk Setup: Seamless integration with SIP trunks for efficient call routing and management.
Server Monitoring: Ensure system reliability with our comprehensive server monitoring services.
Agent Management: Perform CRUD operations for agent profiles, assign agents to campaigns, and manage leads effectively.
Dynamic CRM: Utilize a dynamic Customer Relationship Management (CRM) system for streamlined user and lead management.
Campaign Management: Efficiently handle inbound and outbound campaigns with robust tools for setup and management.
IVR (Interactive Voice Response): Customize your IVR setup and manage voice messages to enhance customer interactions.
Reporting: Access real-time live reporting and detailed insights for both inbound and outbound calls.
DID Management: Simplify the management of Direct Inward Dialing (DID) numbers and bulk uploads.
SIP Trunk Setup: Seamless integration with SIP trunks for efficient call routing and management.
Server Monitoring: Ensure system reliability with our comprehensive server monitoring services.
Agent Management: Perform CRUD operations for agent profiles, assign agents to campaigns, and manage leads effectively.
Dynamic CRM: Utilize a dynamic Customer Relationship Management (CRM) system for streamlined user and lead management.
Project Type
Data Analysis, Development, Cybersecurity, Data Protection, IT, File Conversion, QA, User TestingWhat's included $499
These options are included with the project scope.
$499
- Delivery Time 5 days
- Number of Revisions 0
Optional add-ons
You can add these on the next page.
Fast 3 Days Delivery
+$999Frequently asked questions
65 reviews
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GF
Giorgio F.
May 24, 2026
Linux/VoIP Sysadmin Hetzner CX42 + PJSIP 2.14.1 + Twilio SIP Trunk Experts only Fixed$180
Pankaj delivered solid, production-grade work on the voice AI pipeline integration (VoIP, RTP, Whisper STT, Anthropic LLM, Inworld TTS). The stabilization phase brought real improvements: clean async architecture, working barge-in handling, multilingual fallback logic, and tested deployment on Hetzner. Documentation was thorough and the codebase was left in a maintainable state.
Communication was professional and reliable throughout the engagement. He raised technical concerns proactively and explained trade-offs clearly.
I recommend Pankaj for VoIP, real-time audio, and AI voice pipeline projects.
Giorgio
Communication was professional and reliable throughout the engagement. He raised technical concerns proactively and explained trade-offs clearly.
I recommend Pankaj for VoIP, real-time audio, and AI voice pipeline projects.
Giorgio
GF
Giorgio F.
Apr 26, 2026
Linux/VoIP Sysadmin Hetzner CX42 + PJSIP 2.14.1 + Twilio SIP Trunk Experts only Fixed$180
"Pankaj delivered Block 1 professionally and on time. He solved technical problems independently, switched from PJSIP to Asterisk autonomously when needed, and communicated clearly throughout. Clean documentation and reliable work. Highly recommended."
SF
Steven F.
Apr 23, 2026
CDL Development Backend
Pankaj was highly responsive and quickly grasped the requirements for a complex digital forensics task. He delivered a thorough forensic report in multiple formats, proactively supplemented his work with additional analysis, and offered helpful guidance on tooling. Communication was prompt and professional throughout. Recommended for backend/forensics and data-parsing engagements
EZ
Enrique J. Z.
Jan 12, 2025
call center twilio
Pankaj responds very fast and is expert in call centers. he solved our issues very fast.
SV
Sidney V.
Sep 6, 2021
Database Development, Schema and Documentation, API development & Swagger Documentation
Great experience with gVenture. Smart and hard working. Will work with them more in the future.
About Pankaj
AI Voice Agent VoIP & CCaaS Architect | FreeSWITCH FusionPBX |Asterisk
100%
Job Success
Delhi, India - 1:43 am local time
If your project involves FreeSWITCH, Asterisk, FusionPBX, FreePBX, VICIdial, multi-tenant PBX, LiveKit, AI Voice Agent, answering service platforms, or custom CCaaS development — you are in exactly the right place.
CONTACT CENTER AND CCAAS PLATFORM DEVELOPMENT
This is my core specialization. I build full contact center platforms from the ground up — inbound and outbound, single-tenant and multi-tenant, on-premise and cloud-hosted.
What I build:
• Custom CCaaS platforms with agent dashboards, queue management, and real-time analytics
• Multi-tenant IP PBX for hosted telephony providers and resellers
• Answering service platforms with live agent and automated call handling
• Predictive, progressive, and power dialer systems
• Inbound ACD with skill-based routing, overflow, and priority queues
• Call recording, monitoring, whisper, and barge-in features
• Wallboard and supervisor dashboards with live queue stats
• CDR reporting, billing integration, and usage analytics
• Click-to-call, callback scheduling, and missed call workflows
• IVR design, call flow automation, and self-service menus
• DID and SIP trunk provisioning for multi-tenant environments
• White-label CCaaS platforms for agencies and telcos
FREESWITCH AND ASTERISK DEVELOPMENT
I work at the infrastructure level — not just configuration, but full custom development.
What I build:
• FreeSWITCH dialplan development, ESL scripting, and module customization
• Asterisk AGI, AMI, and ARI integrations for custom call logic
• FusionPBX multi-tenant configuration and custom feature development
• FreePBX customization, module development, and third-party integrations
• VICIdial installation, customization, campaign management, and API integration
• GoAutoDial setup, configuration, and CRM integration
• SIP, RTP, and codec troubleshooting at the protocol level
• WebRTC softphone integration with FreeSWITCH and Asterisk
• High-availability and load-balanced VoIP infrastructure
UCAAS AND IPPBX SAAS PLATFORMS
What I build:
• Hosted UCaaS platforms with voice, video, messaging, and presence
• IP PBX SaaS with self-service provisioning and billing
• Reseller and white-label PBX platforms for ITSPs
• Extension, ring group, and hunt group management
• Voicemail, fax-to-email, and call forwarding features
• SIP trunk marketplace and DID number management
AI VOICE AGENT INTEGRATION
I integrate AI voice capabilities into existing contact center and PBX infrastructure — not as a replacement, but as an enhancement layer.
What I add to CCaaS platforms:
• AI-powered IVR with natural language understanding
• Intelligent call routing based on intent detection
• AI voice bots for after-hours handling and overflow
• OpenAI, Claude, and Gemini integrations with FreeSWITCH and Asterisk
• ElevenLabs and Deepgram for voice synthesis and transcription
FULL STACK AND INFRASTRUCTURE
Backend: Node.js, NestJS, Python FastAPI, Laravel, PostgreSQL, MongoDB, REST APIs, WebSocket, Docker, Linux server management
• Frontend: Next.js, React, Vue.js, Bootstrap 5 for CCaaS dashboards and admin panels
• DevOps: Linux hardening, Nginx, CI/CD, Asterisk and FreeSWITCH server management, SIP and RTP debugging at tcpdump level
WHY CLIENTS CHOOSE ME
• 20 plus years engineering contact center, VoIP, and SaaS systems
• 90 plus successful Upwork contracts with documented outcomes
• I build platforms agencies and telcos sell to their own clients
• Production-grade architecture — no shortcuts, no handoffs after delivery
• Deep SIP, RTP, and telephony protocol expertise
• Honest scoping, clear timelines, and long-term support
RECENT WORK
• Custom multi-tenant CCaaS platform with agent dashboard and analytics
• FreeSWITCH-based AI voice agent with OpenAI Realtime API integration
• VICIdial installation and CRM integration for outbound call center
• FusionPBX multi-tenant deployment for hosted PBX provider
• Answering service platform with live agent and IVR fallback
• Telecom ERP with CDR billing, DID provisioning, and reseller management
• Next.js supervisor dashboard with real-time queue and agent stats
IDEAL PROJECTS
• Custom CCaaS platform development
• Multi-tenant PBX and UCaaS SaaS builds
• AI Voice Agent With MiltiTenant
• FreeSWITCH and Asterisk development and customization
• FusionPBX and FreePBX configuration and development
• VICIdial installation, customization, and API integration
• Answering service and contact center platform builds
• IP PBX SaaS and infrastructure management
• AI voice agent integration into existing PBX systems
If you need a telephony architect who builds contact center and VoIP platforms that run real businesses — let us talk.
Steps for completing your project
After purchasing the project, send requirements so Pankaj can start the project.
Delivery time starts when Pankaj receives requirements from you.
Pankaj works on your project following the steps below.
Revisions may occur after the delivery date.
Initial Consultation:
Objective: Understand the client’s requirements, current system (if any), and specific needs. Actions: Schedule a meeting with key stakeholders. Discuss objectives, features needed, and customization requirements.
Documentation Collection:
Objective: Gather all necessary information to configure the system. Actions: Request organizational details, user roles, and permissions. Collect existing data for migration (if applicable). Obtain any integration requirements with third-party