Enterprise VoIP & LAN/WAN
Specialized in Grandstream UCM deployment, SIP Trunking, IVR call routing, and low-latency LAN/WAN topologies.
- High Voice Quality (QoS Prioritization)
- FXO/FXS Gateway & Analog Integration
Professional Biography & Engineering Profile
Engineering High-Uptime Networks, VoIP & Perimeter Security
Network & VoIP Engineer with hands-on experience in Grandstream IP PBX, FXO/FXS gateways, IVR design & IP telephony deployment. Experienced in managing LAN/WAN infrastructure, configuring network devices & troubleshooting real-world voice and data issues to maintain high system uptime. Strong in security hardening and project-based network rollouts.
MD TANVIR KHANNetwork, Security & Infrastructure Engineer
2+ Years
Experience
Enterprise Networking & VoIP
99.99%
Service Uptime
High-Availability Topologies
24+ Systems
Hardware & Tools
Cisco, Fortinet & MikroTik
10+ Verified
Certifications
Vendor-Accredited Credentials
Engineering Methodology & Pillars
How I approach enterprise infrastructure and system design.
Perimeter & Firewall Hardening
Deploying FortiGate, pfSense, and Cisco ASA firewalls with zero-trust network segmentation and encrypted tunnels.
- Site-to-Site IPsec & Remote SSL-VPN
- Intrusion Prevention (IDS/IPS) & NAT
Monitoring & Incident Response
Continuous network telemetry, traffic flow analysis with Wireshark, SNMP traps, and proactive outage prevention.
- Automated Telegram & Email Alerting
- Packet-Level Root Cause Diagnostics
Technical Arsenal & Tools
Categorized technologies and hardware platforms.
VoIP & Telephony
2 TechsGrandstream IP PBX & UCMSIP Trunking, FXO/FXS & IVR Gateways
Languages
1 TechsTypeScript
Network Infrastructure
3 TechsCisco Routing & SwitchingMikroTik RouterOS & Traffic ControlLAN/WAN Subnetting & VLAN Design
Frontend
4 TechsNext.js (App Router)ReactTailwind CSSMotion for React
Accredited Certifications
Validated industry qualifications and credentials.
Google / Coursera
VerifyGoogle IT Support Professional Specialization
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