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!!
VoIP Software
VoIP Administration
VoIP
VICIDIAL
FreePBX
Linux System Administration
Asterisk
3CX
MySQL
VoIP PBX
Full-Stack Development
Twilio
PHP
PBX
AI Bot
Muhammad S.
Lahore, Pakistan
$35/hr
4.9
100 jobs
I have more than 13years of experience with different VoIP tools Especially Asterisk, Vicidial, Freeswitch, Kamailio and OpenSips. I got hands on experience of Asterisk, Call center development, Click2Call, Callback, A2billing, Vicidial, AGI custom script writing, IVR development using PHP, Mysql. I have great experience with:
- Call Center development
- Call Center Hosted solution (Ready to use)
- Call Center CC USA, UK and other countries Carriers
- Multi-tenant PBX development
- WebRTC (Web Phone)
-Vicidial(predictive auto dialer) CRM integrations, custom reporting, wallboard, dashboard etc.
- Distinctive Dial Plans and IVR Development
- VoIP billing solution development
- Asterisk Integration with Web Applications and CRMs.
- AGI and AMI script writing
- FreePBX for small office/home offices
VoIP Software
VoIP Administration
VoIP
Asterisk
OpenSIPS
PHP
Kamailio
SMS Gateway
VICIDIAL
MySQL
FreeSWITCH
FreePBX
Usama A.
Burewala, Pakistan
$50/hr
4.9
93 jobs
I am Microsft Certified System Engineer and have working experience in Networking / Systems and Cloud IP Phone Systems.
*PBXware from Bicom System
*Vital PBX
*3CX Phone System
*Ring Central
*Phone System Installations and Configurations (3CX, Avaya IP Manager, Vital PBX, Genesys Cloud, Alcatel, Cisco, Asterisk Server, etc.)
* Remote Support For MS Windows, MS Server, Phone systems configurations
* Windows Server 2008,2012,2016,2019 Full Support
* All Kind Of Software Installation
* Bicom PBXware, Multi Tenant, Call Center & Business Editions along with Serverware
* Server Backups
* Basic Troubleshooting for all OEMs mentioned above
* Best Customer Services Guranteed
VoIP Software
VoIP Administration
VoIP
Call Center Management
CallTools Call Center Software
Microsoft Teams
3CX
Twilio
Phone Communication
Linux
Grandstream
Technical Support
Microsoft Windows
Session Initiation Protocol
PBX
Muhammad Sohaib K.
Karachi, Pakistan
$15/hr
5.0
13 jobs
CAREER OBJECTIVES:
To perform and grow in a challenging environment with many opportunities to learn
and grow both in experience and as a person
VoIP Software
VoIP Administration
VoIP
Ansible
Amazon Web Services
Linux
Docker
Linux System Administration
VPN
Zaheer M.
Peshawar, Pakistan
$20/hr
4.9
99 jobs
I'm a network and System Engineer with 12 years of experience in various environments, including both home and corporate networks.
I can help you with the following areas
Protocols and IP Services: VLANs, Etherchannel, LACP, Spanning Tree STP and RSTP, ACLs, VPNs, RADIUS, PPPoE, DNS, DHCP, Proxies, SNMP, Host and Network-based Firewalls.
Servers and IT Infrastructure
- VMware ESXi, hyper V, citrix XEN
- Active Directory, Windows Servers, print, file.
-Red Hat, CentOS, Debian, and Ubuntu configuration and deployment
- VOIP Servers Free PBX(Asterisk, Elastix, FreePBX, 3CX)configuration and deployment
-Office 365 configuration and administration
- Microsoft Azure cloud services
-AWS Solution Architect
VoIP Administration
Microsoft Azure
Firewall
macOS
Office 365
Microsoft Active Directory
Citrix Hypervisor
Red Hat Certified Engineer
Cisco Certified Network Associate
VMware ESX Server
Microsoft Certified Information Technology Professional
Asterisk
Web Server
Sophos Sophos UTM
Fortinet
Abdus S.
Islamabad, Pakistan
$15/hr
5.0
22 jobs
Top Rated IT Infrastructure & Security Engineer with 700+ hours on Upwork and a 100% Job Success Score. I keep phone systems, firewalls, and servers running for small businesses and MSPs — so your team stays connected, protected, and productive.
What I do:
✔ IT Support & Helpdesk — remote troubleshooting, ticket handling (Tier 1–3), user onboarding/offboarding, printer and endpoint issues, and ongoing support contracts for businesses and MSPs
✔ 3CX VoIP — new deployments, V18→V20 migrations, SIP trunk configuration (Twilio, Broadvoice), IVR, queues, DID routing, integrations, and troubleshooting
✔ FortiGate firewalls — SSL-VPN setup for remote teams, firewall policies, split tunneling, secure remote access, and web filtering
✔ VMware virtualization — ESXi and vCenter administration, VM provisioning, migrations (P2V/V2V), performance troubleshooting, and host maintenance
✔ Backup & disaster recovery — Veeam configuration, backup health checks, and restore testing for VMware environments
✔ Infrastructure & Information Security — network segmentation (VLANs), firewall hardening, VPN security, access control, MFA rollout, patch management, and security best practices to protect your business data
✔ Microsoft 365 & Intune — tenant administration, Exchange Online, device enrollment, and MDM policies
✔ Networking — network design & deployments, troubleshooting, and network optimization
✔ Server administration — Windows Server, RHEL/Linux, Active Directory, and day-to-day IT support
How I work:
I follow ITIL-aligned practices — structured incident and change management, proper documentation, and root-cause fixes instead of quick patches. Fast response times, clear documentation after every job, and plain-English updates — no jargon, no disappearing mid-project. I've handled everything from single urgent fixes to long-term support contracts, and my clients keep coming back because things get done right the first time.
Let's talk:
Message me with your issue — I'll tell you honestly whether I can fix it, how long it will take, and what it will cost. No overselling, no surprises.
VoIP
IT Support
Veeam
Microsoft Intune
Helpdesk
3CX
Office 365
Network Security
Technical Support
Customer Support
Windows Server
Ubiquiti
System Administration
Network Administration
Firewall
VMware Administration
Red Hat Enterprise Linux
Disaster Recovery
Microsoft Active Directory
FortiGate Firewall
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