Ahsan U.
VoIP & Avaya, VitalPBX, 3CX, ViciBox | Firewall & VPN | SIP Trunking
I am a VoIP and network security expert with over 7 years of hands-on experience delivering custom communication solutions for businesses worldwide. I specialize in deploying and supporting VoIP systems such as Avaya, Asterisk, 3CX, Mitel, FreePBX, FusionPBX and Kamailio, with deep expertise in SIP routing, SIP trunking, and cloud telephony. I’ve worked with major providers including Twilio, Voip.ms, Telnyx, and Voxtelesys, and offer reliable integration and troubleshooting services. I also have a strong background in VPNs, firewalls, and secure networking — including Fortinet, pfSense, OPNsense, WireGuard, OpenVPN, and IPSec setups — especially for remote access and restricted regions. Additionally, I offer AI Voice Assistant setup and integration with VoIP systems, as well as AI chatbots for websites and WhatsApp Business automation. My clients benefit from project-based deployment, long-term support, and a live lab environment where I demo solutions in real time before final delivery and deliver reliable, well-tested solutions designed around your business needs. Let’s work together to secure and optimize your communications systems.
Earnings and projects
Last 6 months ÷ 6
Last 6 months: $196
Billed in all: $4,312$4.3k
$98 in the last 6 months
Across 24 contracts
Earnings, last 30 days
Skill rankings: Top 29% in FreePBX
Ranked by MRR among everyone on Upwork with the skill.
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