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
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MD Tanvir KhanNetwork & VoIP Engineer | Security & Infrastructure Specialist
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.
Network Infrastructure
5 TechsCisco CatalystCisco NexusMikroTik RouterOSVLANs & TrunkingBGP & OSPF
VoIP & Telephony
5 TechsGrandstream UCM PBXFXO/FXS GatewaysSIP TrunkingIVR Call FlowSession Border Controllers
Perimeter Security
5 TechsFortinet FortiGatepfSensePalo AltoIPsec VPN / SSL-VPNFirewall NAT Policies
Systems & Cloud
5 TechsLinux (Ubuntu/Debian)Windows ServerVMware ESXiDockerWireshark Telemetry
Need a custom network, server, VoIP or security solution?
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