👋 Hi, I'm Hepshiba Beula, a Networking Engineer with 4+ years of experience specializing in Optical Networks (ONTs & OLTs), VoIP, PBX, Asterisk, Wi-Fi module development, and Network Administration. I have hands-on expertise in embedded systems, networking protocols, and firmware development for high-performance telecommunications solutions.
Key Expertise:
✅ ONTs Development & Support – Data flow monitoring, VoIP support, OMCI stack enhancements
✅ Wi-Fi Module Engineering – Performance optimization, debugging, and system enhancements
✅ VoIP Network Enhancements – SIP signaling, VoIP debugging (Asterisk, Wireshark), FXS device integration, FreePBX deployment
✅ Network Administration – VLANs, switch-based configurations, traffic monitoring (Ixia, Spirent)
✅ Embedded Software Development – C programming, Data Structures, Linux-based development
✅ Packet Analysis & Debugging – Deep packet inspection, protocol debugging (Wireshark, Asterisk)
✅ OLT Support – Ensuring seamless integration and maintenance of Optical Line Terminals
Professional Experience Highlights:
🔹 Optical Networks (ONT Development & OLT Support)
Developed OMCI stack interfaces for ONTs, enabling seamless network provisioning.
Worked on PON activation, MIB Upload, and software upgrades for Adtran ONTs.
Designed and implemented CFM Protocol on Cortina-based targets.
Monitored data flow and ensured VoIP support for ONTs in live network environments.
🔹 Wi-Fi Module Enhancement & Debugging
Enhanced and maintained the BGW320 Wi-Fi module for AT&T residential gateways.
Debugged and optimized Wi-Fi performance, including network stability and traffic flow.
🔹 VoIP & Network Optimization
Implemented VoIP handling in FXS devices (Cortina 6xx, BRCM 8xx, 62x).
Debugged VoIP packets using Asterisk, Wireshark, ensuring high call quality.
Managed SIP signaling and VoIP enhancements for network efficiency.
Has experience in deploying FreePBx on cloud server and configuration of trunk and SIP routing and extension
🔹 Network Configuration & Traffic Analysis
Monitored and optimized network traffic using Ixia, Spirent for data packet analysis.
Configured VLANs, switches, and network routing for optimal data flow.
Tech Stack & Tools:
💻 Languages: C, Python, Shell Scripting
🛠 Tools: Git, JIRA, Bitbucket, Confluence, Perforce, Wireshark, Asterisk, IXIA, Spirent
📡 Platforms: Linux/Unix, Residential Gateways, Optical Line Terminals (OLTs), Optical Network Terminals (ONTs)
I am open to networking, IT infrastructure, and embedded systems roles, bringing strong problem-solving skills and expertise in network administration, VoIP, and optical networking solutions. Let’s connect and collaborate! 🚀
Fiber Optics
VoIP
VoIP PBX
VoIP Administration
DHCP
Optical Engineering
WiFi
FreePBX
Asterisk
Twilio
MikroTik
TCP/IP
Linux
UniFi
Router
Virtual LAN
Embedded C
Embedded System
Network Engineering
Network Administration
Thasleem R.
Tirunelveli, India
$5/hr
4.7
18 jobs
Basically i am an electronics and communication engineer. I have done many projects in the given fields.
1. Digital electronics, electronic circuits
2. digital communication
3. antenna and wave propagation
4. Microprocessor and microcontroller
5. Digital signal processing
6. Signals and systems
I also have well experienced in the following softwares
1. MATLAB
2.CST studio suite
3. Multisim
4. LT spice
5. Xilinx, Microwind and Tanner EDA
6. photoshop
I also have well experienced in wordpress, youtube development and logo design
I can do mathematics and statistics projects also
I also do article rewriting, proofreading, plag removal..............
I have well experienced in any kind of antennas
Telecommunications Engineering
MATLAB
C++
Analog Electronics
Electronic Circuit Design
Verilog
NI Multisim
Antenna Design
Xilinx
VHDL
Digital Signal Processing
Computer Engineering
Cadence Platform
Electronic Design
Pankaj K.
Delhi, India
$45/hr
4.9
113 jobs
FreeSWITCH, Asterisk, FusionPBX, VoIP, Contact Center (CCaaS), AI Automation & Voice Agent Architect with 20+ years of engineering experience and 90+ successful Upwork projects.
I help telecom providers, startups, BPOs, answering services, and service businesses build production-ready communication platforms, AI voice systems, and workflow automations that reduce manual work, improve customer handling, and scale reliably.
My core work spans FreeSWITCH, Asterisk, FusionPBX, SIP, WebRTC, Contact Center platforms, multi-tenant PBX, AI Voice Agents, and business process automation. Whether you need a hosted PBX, a custom CCaaS platform, AI-powered call handling, or workflow automation across CRM, support, and operations, I can design, build, integrate, and scale the complete solution.
Contact Center (CCaaS), PBX & VoIP Platform Development
I build complete telecom and customer communication platforms for telecom providers, contact centers, answering services, and enterprise teams.
Services include:
• Custom Contact Center (CCaaS) platforms
• Hosted PBX, UCaaS, and Multi-Tenant PBX systems
• Agent dashboards, supervisor panels, wallboards, and reporting
• Skill-based routing, IVR, call flow automation, and queue management
• Predictive, progressive, and power dialers
• Call recording, monitoring, whisper, barge, and analytics
• CRM integrations, click-to-call, callback workflows, and usage reporting
• DID provisioning, SIP trunk integrations, and carrier connectivity
• White-label telecom platforms for providers and resellers
FreeSWITCH, Asterisk & FusionPBX Development
Telephony is my core specialization—not just PBX setup, but full product and platform development.
I work on:
• FreeSWITCH ESL development, custom dialplans, and call routing logic
• Asterisk AGI, AMI, and ARI integrations
• FusionPBX and FreePBX customization
• VICIdial and outbound campaign platform customization
• Multi-tenant PBX architecture and provisioning flows
• SIP trunking, DID routing, RTP troubleshooting, and WebRTC softphones
• Performance optimization, high-availability design, and production deployment
AI Voice Agents, AI Integration & Workflow Automation
I help businesses use AI where it creates measurable operational value—not just demos or isolated bots.
I design and implement:
• AI Voice Agents, AI receptionists, AI IVR, and intelligent call routing
• OpenAI, Claude, Gemini, and real-time voice integrations
• Voice AI workflows for customer service, after-hours call handling, lead qualification, and phone automation
• CRM automation, email automation, reporting workflows, and internal process automation
• AI assistants for support teams, operations teams, and internal knowledge workflows
• API-based workflow automation across multiple systems and business tools
Tools and platforms I work with include OpenAI, Claude, Gemini, LiveKit, ElevenLabs, Deepgram, REST APIs, webhooks, and custom backend integrations. Where needed, I can also help evaluate the right automation stack and connect AI capabilities into your existing business systems.
Technology Stack
Telephony: FreeSWITCH, Asterisk, FusionPBX, FreePBX, VICIdial, SIP, RTP, WebRTC, SIP.js, Twilio, Telnyx, LiveKit
Backend: Node.js, NestJS, Python (FastAPI), Laravel, PostgreSQL, MongoDB, Redis, REST APIs, WebSockets
Infrastructure: Linux, Docker, Kubernetes, Nginx, AWS, Azure, GCP, Prometheus, Grafana, CI/CD
Recent Project Types
• Multi-tenant CCaaS platforms with real-time dashboards and analytics
• AI Voice Agents integrated with FreeSWITCH using OpenAI Realtime API
• FusionPBX deployments and customizations for hosted PBX providers
• VICIdial implementations with CRM integration and outbound campaign workflows
• Telecom ERP systems with CDR billing, DID provisioning, and reseller management
• Answering service platforms with AI-assisted routing and live-agent fallback
• Custom workflow automation and AI integration for communication-heavy operations
Why Clients Hire Me
✔ 20+ years building telecom, VoIP, and communication software
✔ 90+ successful Upwork contracts
✔ Deep expertise in FreeSWITCH, Asterisk, FusionPBX, SIP, and Contact Center systems
✔ Ability to combine telecom engineering, backend development, and AI automation in one solution
✔ Production-ready architecture with realistic scoping and long-term support
✔ Clear communication, practical implementation, and business-focused problem solving
If you need a consultant or hands-on developer for FreeSWITCH, Asterisk, FusionPBX, Contact Center platforms, AI Voice Agents, VoIP systems, or AI workflow automation, I can help you build a reliable solution that supports real business operations—not just prototypes.
FreeSWITCH
Asterisk
Solution Architecture
VoIP Software
VoIP Administration
Session Initiation Protocol
VoIP PBX
CRM Automation
AI Agent Development
AI App Development
Large Language Model
OpenAI API
Full-Stack Development
Docker
WebRTC
Twilio
Next.js
NestJS
FastAPI
Golang
Vishnu N.
Hyderabad, India
$12/hr
5.0
2 jobs
Hi, I’m Vishnu. I have over 5 years of experience in fiber planning, drafting, and telecom permitting using AutoCAD, Civil 3D, and tools like OCALC, Quick Pole, and GIS. I’ve worked with major telecom outsourcing companies and have hands-on experience in:
🔧 Key Skills & Services:
✓OSP Fiber Routing with section profiles
✓FTTx/FTTH Design & OSP Implementation
✓Fiber distribution planning & drafting
✓Pole load analysis (OCALC, Quick Pole, Katapult Pro)
✓Aerial & Underground (UG) permit drawings
✓Floor plans & redlines/markups
Survey & data collection
✓AutoCAD, ProgeCAD, Civil 3D drafting
✓Image/PDF to DWG conversions
Telecom CAD drawing QA/QC
🧠 Tools & Software:
✓AutoCAD / Civil 3D / ProgeCAD
✓OCALC / Quick Pole / Katapult Pro
✓Google Earth Pro / ArcGIS / QGIS
✓Excel / PowerPoint / Word
✓ Drafting
✓Microsoft Power Bi
✓MySQL
✓Python
✓Data analysis
✓Google Earth Studio
💼 Why Hire Me?
✓Deep understanding of telecom fiber design standards
✓Fast, accurate drafting with attention to detail
✓Reliable communication and on-time delivery
✓Always focused on meeting client expectations 100%
AutoCAD Civil 3D
Building Design
STAAD
Microsoft Excel
QGIS
Splunk
SQL
Web Page
Microsoft Power BI
Data Analysis Consultation
Data Analysis
Rajesh K.
Mohali, India
$20/hr
4.9
6 jobs
Computer Programming Languages:
C++/C
Network Protocols Expertise :
GSM, HLR, USSD, SMSC, INAP, CAMEL, DIAMETER, 4G-LTE, HSS, 4G, PGW, SMPP,
SS7 Protocol software experience:
Dialogic, Aricent, Mobicents Jss7
We provide SS7/Sigtran, based development and deployment services in the domain of telecom and VoIP. Stacks Dialogic, Trillium, and Aricent.
GSM HLR development for MVNOs with 3G and 2G data.
The HLR or Home Location register was developed over Mobicents and Dialogic SS7 protocol stack. The stack uses the Sigtran M3UA layer over SCTP for the connection for ss7 signaling. The solution have key features like Multi-IMSI, Multiple APN profile for data, etc.
HSS development for LTE/4G: HSS or Home Subscriber Server is the central database for a subscriber in 4G/LTE. it hold the subscriber profile based on IMSI. For signaling with the roaming network (MME or SGSN), LTE HSS uses diameter protocol signaling. The interface is called S6a/S6b.
SMSC based on Ss7, SMPP and SIP(IMS):
Providing a complete solution for the SMSC. It could be used as Full SMSC by the MVNO's /MNO's or A2P and other messaging providers.
Camel Gateway for online charging. The camel gateway uses Camel protocol over SS7 or Sigtran. The gateway supports online charging for voice, data and SMS.
A2P, P2A SMSC solution. We have ready solutions for bulk SMS providers. The solution uses SMPP and SS7/Sigtran for messaging with mobile subscribers. Each ESME which connects to the SMS can represent a separate SCCP global title.
USSD Gateway,:
ComCode has ready to use a solution for USSD gateway. The USSD gateway can connect the mobile operators over SS7 or SMPP.
IOT- IOT is a new concept. Which is the connected network of devices? We provide software development for NB-IOT and IoT.
Diameter Gy interface for data charging.
Having full exposure for Private network for 4G an 5G. This includes all the components , MMA, AMF, etc.
use OpenSources such as Open5Gs and kamailio for setting up the private networks.
Telecommunications Engineering
C
C++
Session Initiation Protocol
SMPP
Network Software
Socket Programming
Telecommunications
Mohammad M.
Dewas, India
$15/hr
4.7
10 jobs
Hi,
Thank you for taking the time to visit my profile
I have worked in different types of projects of two major Wireless Carriers of the U.S.A. of 4 different market.
☛ My Skills are :
Macro and Small cell Design (2500+ Sites) :- 5G and 4G NSB and Modification projects for Major USA Carriers
• NSB/ Macro Modification Project “C-Band, CBRS, L600, 4xRx4xTx, AWS, PCS
• Small Cell Design using the Starling data in the MapInfo Pro
• Small cell Ring Identification, Candidate Selection, Antenna Selection, HUB Capacity & Fiber Distance Analysis and planning
• Creating RFDS and updating various design databases like ATOLL and ASSET Database
• COP Package review, reviewing post construction pictures, Sweep test, and PIM Test results, Antenna alignments checks, Antenna and port connection verification, and Tape Drop pictures
Drive Testing and Walk Test projects:- Venues including, NFL Stadium, Airports, Hospitals and large retail building
• Post processing the Drive Test and Walk test log files using TEMS and Mapinfo tool for detail report creation
• Creating a detail Drive routes for Field engineers using Mapinfo and Google earth
• Calculating Daily routes miles drove and capturing the missing roads, using Mapinfo Querys
• Post Processig Walk test results and plotting the results on floor plans and doing a detail analysis on walk test and optimization suggestions for the inbuilding venues
Expertise "Making and Reviewing" -: RFDS, CD "Construction Drawing", Plumbing Diagram, Port Metrix, COP "Final Close Out Package of Site".
Equipment Knowledge -: Ericsson Equipment, Nokia 4G & 5G AirScale RAN & Remote Radio Equipment, Commscope & Andrew & JMA's Antenna Equipment Etc.
► web development (WordPress/ Shopify store/ WooCommerce)
► E-commerce store design & development, Ad Campaign Run and optimization, Google analytics
► Internet research, Data Scraping, Data mining
► Language Translation/Transcribe Service
English to Hindi (vice versa)
English to Urdu (vice versa)
*having a good experience in technical, legal and general translation
► PDF Editor/Data Entry/Administrative Support
also, have a great experience in data typing and PDF editing/conversions with 99%+ accuracy.
====================================================
☛I guarantee a fast turn around of quality and 100% original content.
Telecommunications Engineering
Data Scraping
Technical Support
Data Mining
PHP
Shopify
Wireless Network Implementation
Microsoft Office
Mapinfo
Microsoft Excel PowerPivot
Google Earth
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