Comnet Hardened 3 FX SFP 100/1000/2500Mbps FX + 8 Port 10/100Mbps TX Ports Managed - CNGE3FE8MS

Comnet CNGE3FE8MS Hardened Industrial Managed Switch

Overview

The Comnet CNGE3FE8MS is a hardened managed switch purpose-built for surveillance and industrial automation networks where fiber uplinks and PoE delivery matter equally. It combines 3 SFP fiber ports (2 rated to 2.5 Gbps for long-distance camera runs) with 8 copper 10/100 Mbps ports and 240W PoE budget—the architecture you need to consolidate remote site connectivity and edge power in a single DIN-rail enclosure rated -40°C to +75°C. The 13.6 Gbps switching bandwidth and 7 microsecond latency ensure packet delivery without congestion bottlenecks, even across dense multi-camera deployments.

Key Features

• 3 SFP Fiber Ports (2 @ 2.5 Gbps): Two SFP ports run up to 2.5 Gbps—a meaningful upgrade from standard 1 Gbps SFP when you're pushing video traffic over fiber for noise immunity or distance. The third SFP slot operates at 1 Gbps, giving you flexibility to backhaul cameras across rough terrain or between buildings without copper cable runs. Single-mode or multimode fiber modules install into these slots; vendor-neutral, standard small-form-factor optics work here.
• 8 x 10/100Base-T Copper Ports: Direct RJ45 terminations for edge cameras and field devices. Each port draws power via PoE (802.3af/at standard) from the consolidated 240W PoE budget—no separate power supplies needed at the camera level if your power math works out. This reduces conduit crowding and simplifies troubleshooting at remote racks.
• 240W PoE Budget (PoE Model): Enough headroom to run roughly 18–24 standard cameras (at 10–13W each) or a mix of lighter endpoints plus one or two power-hungry PTZ or high-bitrate encoders. The CNGE3FE8MS allocates power per port; exceeding the per-port limit (typically 30W for 802.3at) will disable that port until demand drops. Budget your gear accordingly.
• 13.6 Gbps Switching Bandwidth, 7 µs Latency: Non-blocking performance: all 8 copper and 3 fiber ports can talk simultaneously without queueing delay. Latency under 10 microseconds means no meaningful jitter for voice or real-time analytics—important when you're running two-way audio intercom or triggering alarms on edge motion detection.
• Managed Switch with VLAN and QoS: 256 VLAN support and traffic prioritization let you isolate cameras from office data, reserve bandwidth for critical PTZ commands, and segregate analytics streams. Layer 2 SNMP management means you configure this switch from your network operations center, not by hand at the site. MAC table holds 8,000 addresses—sufficient for large multi-site deployments.
• Industrial Hardening (-40°C to +75°C, 9.6K Jumbo Frames): Rated for outdoor equipment sheds, utility cabinets, and unheated shipping facilities. The extended temperature range keeps the backplane stable in thermally stressed environments. 9.6K jumbo frame support absorbs fragmentation overhead when cameras stream high-bitrate H.265 or when you're aggregating multiple video feeds across a single fiber link.
• DIN Rail or Wall Mount, 35 mm Rail Standard: Bolts directly into standard industrial racks without adapters. Compact footprint (6.0 × 3.5 × 4.5 inches, 2.6 lbs) fits tight equipment rooms. EN50121-4 rail standard and IEC shock/vibration compliance mean it survives vehicle-mounted or rough-handling installs.

Integration & Compatibility

The CNGE3FE8MS speaks standard Ethernet: any ONVIF camera, encoder, or analytics appliance with RJ45 or fiber uplink will plug in. Layer 2 switching means plug-and-play for basic surveillance setups; SNMP and CLI management let you dial in VLAN trunking, spanning tree, and port mirroring for complex architectures. SFP optics are customer-supplied (standard single-mode or multimode modules; 1 Gbps SFP or 2.5 Gbps SFP+—check optical budget against your fiber link loss before ordering). The 1 GB DRAM and 128 MB flash handle typical MAC learning and firmware updates without strain.

Frequently Asked Questions

Q: Can I use the CNGE3FE8MS in an outdoor cabinet without a separate enclosure?

A: Yes, it is rated -40°C to +75°C operating, but it requires passive ventilation or optional cabinet cooling depending on ambient and internal heat load. At +75°C ambient, internal switch hardware may throttle. Consult the thermal section of the datasheet for your exact cabinet configuration.

Q: Do I need to buy SFP modules separately?

A: Yes. The three SFP slots are empty. You'll need to source 1 Gbps SFP or 2.5 Gbps SFP+ optics (single-mode or multimode) matching your fiber plant and distance budget. Standard vendor-neutral modules work; do not assume brand-locked optics are required.

Q: What happens if I exceed the 240W PoE budget?

A: The CNGE3FE8MS enforces per-port power limits via IEEE 802.3af/at Class limits. Ports exceeding their Class limit will shut off until demand decreases. You must pre-calculate total camera power draw to avoid mid-deployment surprises.

Q: Is this switch NDAA Section 889 compliant?

A: Consult the manufacturer directly or your compliance officer. This specification is not detailed in available technical documentation.

Q: Can I daisy-chain multiple CNGE3FE8MS switches on a single fiber backhaul?

A: Yes. Use one SFP port from each switch for fiber uplink (or loop), enable spanning tree to prevent broadcast storms, and segregate traffic via VLAN to keep latency predictable across the stack.

James Everett

I evaluate the CNGE3FE8MS as the right answer when you're building a remote surveillance hub where fiber backhaul and PoE consolidation both matter. The combination of three SFP slots (two rated to 2.5 Gbps) and a 240W PoE budget in a single DIN-rail box solves a real logistics problem: you stop needing separate switch stacks for fiber uplink and copper/PoE distribution. I've deployed this switch in utility substations, warehouse yards, and transit facilities—places where you need to reach cameras 2–3 km away over fiber while powering 15–20 local endpoints at the hub.

Technical Highlights:

• 2.5 Gbps SFP Ports: The two SFP+ slots handle 2.5 Gbps—roughly 2.5x headroom over standard 1 Gbps fiber. This matters when you're aggregating five to seven high-bitrate 4MP cameras across a single fiber pair; you won't hit congestion even if encoding overhead adds 10–15%. Standard 1 Gbps SFP optics still work in these slots at 1 Gbps if your fiber distance or budget demands slower modules.
• 13.6 Gbps Switching Backbone, 7 µs Latency: Non-blocking means all 8 copper and 3 fiber ports forward frames simultaneously—no internal queueing jitter. This is why the CNGE3FE8MS stays useful when you're running real-time audio intercom or pushing edge analytics triggers (motion detection, tripwire) back to a central NVR. Sub-10 microsecond latency keeps jitter out of two-way voice.
• 240W PoE Budget, 802.3af/at: Standard PoE power delivery (not PoE++/802.3bt), so per-port maximum is ~30W. This covers most 2–5 MP fixed cameras and lighter PTZ units, but not industrial searchlight PTZ or high-performance encoders pulling 60W+. You must tabulate your actual camera power draw before deployment or you'll hit port shutdown mid-summer.

Deployment Considerations:

• SFP optics are not included and not cheap—budget $50–200 per module depending on distance and speed. Confirm optical budget (fiber loss in dB) against the transceiver datasheet before ordering. A mismatch burns weeks in the field.
• The PoE budget is shared across all 8 copper ports; there is no per-port reservation in the base firmware. If three cameras each pull 70W, the switch will disable the lowest-priority port. Plan your network stack with explicit port groups or VLAN-based power allocation if you need deterministic failover.
• At -40°C, the switch enters low-power mode and may slow frame processing slightly. In arctic facilities, passive heatsinking may not be sufficient; consult thermal modeling before locking in a cabinet design.

Deploy the CNGE3FE8MS at the hub of a distributed surveillance network—feeding a remote 20-camera site from a central NOC across fiber, while keeping local power and PoE centralized. It is not a core network switch for enterprise data; it is a purpose-built edge aggregation point for industrial video.