Description
Fortinet FortiExtender 311F (FEX-311F)
The Fortinet FortiExtender 311F is a high-performance 4G LTE Advanced (CAT16) secure wireless WAN gateway designed to extend Fortinet Secure Networking to remote sites, branches, retail stores, healthcare facilities, and industrial environments. Built for resiliency and deep FortiGate integration, the 311F delivers reliable LTE connectivity with intelligent failover, fiber support, and centralized management through FortiOS.
It enables organisations to deploy secure, always-on WAN connectivity without sacrificing visibility, control, or performance.
High-Performance LTE Connectivity
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LTE CAT16 module (Global carriers)
Supports high-speed 4G LTE with up to 1 Gbps download / 150 Mbps upload module capability -
Dual-SIM support with intelligent failover algorithms
Automatic switching based on signal strength, disconnects, link health, or data plan thresholds -
Advanced radio technologies
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2x2 MIMO
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Receiver diversity and equalization for improved edge-of-cell performance
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GPS/GNSS antenna support for location-aware deployments
This makes the 311F ideal as:
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Primary WAN in remote or temporary sites
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Failover link for critical branch connectivity
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Rapid deployment solution where wired circuits are delayed
Flexible WAN & LAN Interfaces
The FortiExtender 311F provides both copper and fiber connectivity options for maximum deployment flexibility:
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2x GE WAN Ports
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1x GE RJ45 WAN
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1x GE SFP WAN (fiber support for >100m deployments)
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4x GE RJ45 LAN Ports
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Connect local devices, switches, or FortiGate HA pairs
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1x USB 2.0 Type-A Port
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1x RJ45 Console Port
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IEEE 802.3at PoE Powered (25.5W) or optional 12V/3A adapter
PoE support allows installation up to 100 meters from the FortiGate or switch, positioning the device where LTE signal strength is optimal without expensive antenna cabling.
Deep FortiGate & Secure SD-WAN Integration
When connected to a FortiGate, the FortiExtender 311F appears as a standard network interface in FortiOS, enabling:
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Centralized policy enforcement
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Secure SD-WAN path selection
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FortiGuard security services
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Traffic shaping and application visibility
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WAN load balancing and failover configuration
It supports:
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IPsec VPN over wired and LTE
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Layer-2 LAN extension (VxLAN over IPsec)
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Single Pane of Glass management via FortiGate and FortiManager
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L2 Tunnel Mode via VLAN or CAPWAP
This ensures consistent security posture across distributed environments.
High Availability & Business Continuity
The FortiExtender 311F supports multiple redundancy scenarios:
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Dual-SIM failover
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WAN load balancing between wired and LTE
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Support for HA environments with FortiGate
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Intelligent failover based on link health metrics
In branch environments, this provides seamless connectivity during ISP outages or link degradation.
Deployment Use Cases
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Retail POS & kiosks
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Micro-branches & pop-up sites
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Healthcare facilities
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Industrial & manufacturing environments
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Construction and temporary field offices
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Backup WAN for enterprise branches
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Remote IoT aggregation sites
Hardware Specifications Overview
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Indoor appliance form factor
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Dimensions: 1.83 x 7.48 x 7.83 in (46.5 x 190 x 199 mm)
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Weight: 2.06 lb (0.933 kg)
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Operating temperature: 0°C to 40°C
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Storage temperature: -20°C to 70°C
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Humidity: 5% to 95%
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Certifications: FCC, CE, UL/CSA 62368-1, IEC/EN 62368-1
Why Choose the FortiExtender 311F?
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Enterprise-grade LTE CAT16 performance
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Fiber and copper WAN flexibility
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True FortiGate-native integration
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Secure SD-WAN compatible
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Intelligent dual-SIM failover
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Designed for resilient edge deployments
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Fully managed within the Fortinet Security Fabric
The FortiExtender 311F provides secure, high-availability wireless WAN connectivity while maintaining full visibility, control, and security across distributed enterprise networks.
View data sheet: FortiExtender Series Datasheet
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