Hire the Best Asterisk Consultants

👋 Hi, I’m Oleksii - a Twilio expert with over 7 years of hands-on experience building scalable, real-time communication systems using the full Twilio stack: 📞 Programmable Voice / SMS, 🧠 TaskRouter & Flex, 🎛️ Studio, Functions, Conversations, Sync, Webhooks and more. I’ve successfully completed 120+ Twilio projects on Upwork, including: • Eliminating latency issues in phone calls 🔧 • Creating SMS marketing automation pipelines 📲 • Developing full-scale Flex dashboards with custom workflows 🧩 Clients describe me as: “Very skilled, excellent communicator, smart guy and a pleasure to deal with.” “Oleksii was very helpful and available :) We no longer have problems with latency during our phone calls.” 🛠 Whether you need help with: • Twilio Studio call flows • Complex webhook-based automation • TwiML, IVR, call forwarding setups • Integrating Twilio with CRMs or internal systems • Building voice/SMS logic in Node.js, Laravel, or Firebase environments …I’ve got you covered. Let’s bring your Twilio-powered solution to life 🚀 Feel free to invite me to your job or message me with questions.

I help businesses build, optimize, and manage enterprise-grade contact center solutions using RingCentral and NICE CXone. With 8,000+ hours worked and $100K+ earned on Upwork, I specialize in designing reliable IVR systems, intelligent call flows, routing logic, and customer support automation for both small businesses and large enterprises. What I Can Help You With: ✔ RingCentral UCaaS & CCaaS setup and administration ✔ NICE CXone / InContact development and support ✔ IVR and call flow design ✔ Studio scripting and automation ✔ Omnichannel customer support solutions ✔ API integrations and workflow automation ✔ Technical troubleshooting and platform support ✔ Contact center optimization and reporting ✔ Post-implementation support, maintenance, and system optimization Why Clients Work With Me: ✔ Certified and experienced contact center engineer ✔ Strong communication and project ownership ✔ Fast problem-solving and reliable delivery ✔ Able to manage projects from planning to deployment ✔ Ongoing support available after implementation I focus on building scalable, user-friendly customer experience solutions that improve efficiency and customer satisfaction. Let’s discuss how I can help your business.

Hello, Thanks for visiting my profile. This is Abid Ur Rehman, a certified Asterisk Developer DCAP, VoIP Consultant, VICIDial, FreePBX SCE, 3CX v18 and v20 Certified Advanced Engineer, Elastix ECE, GoAutoDial, The SIP School SSCA, PBXWare, A2Billing, FreeSWITCH, Twilio, FusionPBX, ASTPP, Network CCNA, Windows Servers MCSE, and Linux RHCE certified expert. I graduated with a BS in Telecommunication and an MSc in Telecommunication Networks. Having over 13 years of VoIP/Linux/IT/network planning, design, development, deployment, optimization, administration, and support experience in top-notch organizations such as Telappliant Ltd., Cybergen, SCB Global, Dialer360, and Astericom. Skills and Certification: IP PBX: 3CX, Asterisk, FreePBX, Elastix, PBXware MT, FreeSWITCH, FusionPBX, Issabel, VoIPOffice AI Agents/Integration: ElevenLabs, Vapi SMS Blast/Broadcast using SignalWire, VoIP.ms, Telnyx, Anveo, Bandwidth, Plivo, Skyetel, Twilio, VoxTelesys, BulkSolutions, Flowroute, Intelepeer, and BulkVS Telecom Billing: A2Billing, ASTPP, VOS3000, and Magnus Billing. Dialer: VoiceBroadcast, VICIDial, GoAutoDial, VICIBox Multi-Server Clustering, Dialer360, Primo Dialer IP Phones: Aastra, AND phone, Algo, AudioCodes, Cisco, Cisco/Linksys, CloudTC, Cortelco, CyberData, Digium, H-Tek, Incom, Intelbras, Konftel, Mocet, Norphonic, Obihai, Panasonic, Patton, Phoenix Audio, Polycom, Snom, Thomson, Unidata, Uniden, VTech, Xorcom, Yealink, Yealink/Dreamwave IP PBX (hardware): Sangoma PBXact UC / FreePBX, Elastix IP PBX, Grandstream UCM, Yeaster S-series, Renegadepbx-1U-Appliance-with-FreePBX, Patton's gateways VoIP Providers: USA and Canada: Astericom, Twilio, VoIPdotms, Switch2VOIP, SignalWire, Anveo, Alcazarnetwork, voxbeam, Telus, RingCentral, Call Centric, Voyant (Vitelity), Nextiva, bandwidth, Altotelecom, FlowRoute, QuestBlue, sipdotus, DIDLogic, Nexmo, Plivo, siptrunkdotcom, Telnyx, IDTExpress, Zadarna SMS and Bulk SMS: I can write code for you to send and receive SMS using any Asterisk and FreeSWITCH server and through popular providers like Telnyx, Twilio, Bandwidth, VoIPdotms, and SignalWire. For bulk SMS, I can set up a code with the front end for sending bulk SMS from a CSV . UK: Fuse 2, BT, VoIPTalk, DrayTEL, Telappliant, Gamma, sipgate, VoIPFone, VoiceFlex, Voicehost, Brightstar, Yellowgrid, Gradwell, T4com Ltd, Voxbeam, and Spitfire Linux Distros: CentOS, Redhat EL, Ubuntu, OpenSUSE, Debian, Back Track (Kali Linux) Windows machines: Windows Server 2012 and 2016, Windows Desktop 11, 10, 8, 7, and XP. Cloud Platforms: AWS EC2 and LightSail, GCP, Vultr, BlueHost, HostGear, Hetzner, and Digital Ocean Coding: PHP, MySQL, Lua, XML, JSON, HTML I would be very happy to assist start-ups as well as SMEs in achieving their goals and business objectives. Thank you!!

I help U.S. businesses navigate SMS approval, deliverability, and compliance requirements - reducing the risk of carrier rejections, blocked traffic, and regulatory issues. I specialize in A2P SMS compliance and deliverability, including 10DLC registration, Toll-Free Verification (TFN), and TCPA/CTIA consent audits, as well as diagnosing carrier-level delivery problems. My work focuses on aligning SMS programs with current carrier and regulatory expectations so they can operate and scale responsibly in the U.S. market. If your messages are being rejected, filtered, or delayed - or you’re unsure whether your consent flow and use case will withstand carrier or legal review—I can help assess and correct the underlying issues. What I Do • 10DLC brand & campaign registration (new submissions, rejections, reclassifications) • Toll-Free Verification (TFN) setup and resubmissions • TCPA / CTIA compliance audits (opt-in flows, disclosures, opt-out handling) • SMS deliverability diagnostics (carrier filtering, content flags, throughput limits) • Platform-specific guidance (Infobip, Twilio, GoHighLevel, ClickSend, SimpleTexting) • Compliance-aware SMS automation (webhooks, triggers, rate-limiting, quiet hours)

I am a VoIP and Telephony Engineer with extensive experience in 3CX, VICIdial, Asterisk, FreeSWITCH, Twilio, SIP Trunking, and DID number provisioning. I help businesses build, optimize, and maintain reliable communication systems for call centers, telemarketing operations, and enterprise telephony environments. My expertise includes PBX installation and configuration, SIP trunk integration, number porting, IVR design, call routing, predictive dialer setup, inbound and outbound call center solutions, and VoIP troubleshooting. I am also experienced with Linux server administration, cloud deployments, and API integrations for voice and SMS applications. Whether you need a complete call center deployment, 3CX configuration, VICIdial optimization, Twilio integration, SIP troubleshooting, or ongoing telephony support, I can deliver scalable and dependable solutions tailored to your business needs. Core Skills: • 3CX PBX Administration • VICIdial Installation & Management • Asterisk & FreeSWITCH Development • Twilio Voice & SMS Solutions • SIP Trunk Configuration • DID Number Provisioning & Porting • Predictive & Power Dialers • IVR & Call Flow Design • Linux Server Administration • VoIP Troubleshooting & Optimization • CRM & API Integrations • Call Center Infrastructure Setup I focus on delivering reliable communication systems that improve efficiency, call quality, and business performance. 3CX, VICIdial, Asterisk, FreeSWITCH, Twilio, VoIP, SIP, SIP Trunk, DID Numbers, PBX, IP PBX, Hosted PBX, Cloud PBX, Telephony, Telecom, Telecommunications, Call Center, Contact Center, Predictive Dialer, Power Dialer, Auto Dialer, Progressive Dialer, Call Routing, IVR, Interactive Voice Response, Call Queue, Ring Groups, Voicemail, Call Recording, Number Porting, SIP Carrier, Voice Gateway, Session Border Controller, SBC, WebRTC, SMS Gateway, Twilio Voice, Twilio SMS, Twilio API, Linux Administration, CentOS, Ubuntu, Debian, Rocky Linux, AlmaLinux, MySQL, MariaDB, PostgreSQL, Apache, Nginx, SSH, VPN, Firewall, Networking, TCP/IP, UDP, RTP, QoS, NAT Configuration, VoIP Troubleshooting, SIP Debugging, SIP Trace, Wireshark, CRM Integration, Salesforce Integration, HubSpot Integration, Zoho CRM, Pipedrive, API Integration, REST API, PHP, Python, Bash Scripting, AGI Scripts, Call Flow Design, Inbound Calling, Outbound Calling, Lead Management, Telemarketing, Cold Calling Systems, Voice Broadcasting, Bulk SMS, DID Provisioning, SIP Registration, Carrier Integration, Call Monitoring, Queue Management, Agent Management, Multi Tenant PBX, Failover Configuration, High Availability, Cloud Deployment, AWS, DigitalOcean, Vultr, Linode, Dedicated Servers, VPS Setup, Server Migration, System Optimization, VoIP Security, Fraud Prevention, FreePBX, Issabel PBX, FusionPBX, Elastix, Yeastar, Grandstream, Fanvil, Yealink, Polycom, Cisco VoIP, Sangoma, OpenSIPS, Kamailio, Voice API, Telecom Consulting, Call Center Setup, VoIP Engineer, Telephony Engineer, SIP Expert, 3CX Expert, VICIdial Expert, Twilio Expert, Asterisk Expert, FreeSWITCH Expert, Linux Server Administrator, Network Engineer, Technical Support, System Administration, Remote Support, Cloud Communications, Unified Communications, UCaaS, Business Phone System, Enterprise Telephony, Call Center Optimization, Dialer Configuration, Lead Campaign Management, Real Time Reporting, Call Analytics, Voice Solutions, Telecom Infrastructure, Contact Center Solutions, VoIP Deployment, PBX Installation, SIP Configuration, DID Management, Call Center Technology, Telecom Solutions

✅ Overview I’m a VoIP Administrator with over 10 years of experience managing and optimizing phone systems for businesses of all sizes. I specialize in RingCentral, Dialpad, 8x8, Google Voice, GoTo, and other VoIP platforms — helping companies streamline communication, improve call quality, and ensure reliable call routing. From IVR setup and number porting to call queue management and CRM integration, I deliver solutions that keep phone systems running smoothly for both staff and customers. 💼 Services I Provide Phone System Setup & Administration - RingCentral, Dialpad, 8x8, Google Voice, GoTo, Nice inContact, Grandstream, RingCX IVR (Auto-Attendant) Design & Implementation - Custom menus, business/after-hours routing, multilingual prompts Call Queue & Routing Optimization - Overflow handling, priority routing, and fallback options Number Porting & Account Migration - Hassle-free transfer of business numbers across platforms User Onboarding & Training - Account creation, extension assignments, and permissions Troubleshooting & Support - Call quality issues, dropped calls, one-way audio, faxing problems Compliance Setup - SMS/TCR registration & HIPAA-compliant call handling CRM & Third-Party Integrations - Salesforce, Zapier, Podium, Beetexting 📊 Sample Projects 🔹 Healthcare Practice – RingCentral IVR & Call Queue Built a multi-level IVR for scheduling, billing, and nurse line. Added after-hours routing with voicemail to HIPAA-compliant inbox. Reduced missed calls by 40% within the first month. 🔹 Multi-Location Business – Dialpad Migration Migrated 50+ users fromDialpad to RingCentral. Configured shared call queues and AI-powered call transcription. Delivered staff training and SOP documentation. 🔹 SMS Compliance for Retail Client Completed 10DLC campaign registration for SMS. Updated client website to meet carrier requirements. Enabled mass texting via Beetexting integrated with RingCentral. 🛠️ Tools & Platforms VoIP Systems: RingCentral | Dialpad | 8x8 | Google Voice | GoTo | Nice inContact | RingCX Integrations: Salesforce | Zapier | Zendeskl Collaboration: Microsoft Teams | Google Workspace 📌 Why Clients Hire Me ✔ 10+ years of proven VoIP expertise ✔ Fast, reliable setup & troubleshooting ✔ Clear documentation & training for staff ✔ Track record of reducing missed calls and improving customer experience 📞 Let’s Work Together If you need a VoIP expert to set up, optimize, or troubleshoot your phone system, let’s connect. I’ll ensure your communications are seamless, reliable, and built to support your business growth.