Comnet HARDENED 3PORT 1000MBPS + 7 PORT 10/100MBPS MANAGED SWITCH - CNGE3FE7MS2K

Comnet CNGE3FE7MS2K Hardened 10-Port Managed Switch

Overview

The Comnet CNGE3FE7MS2K is a hardened managed switch purpose-built for surveillance and industrial deployments where temperature extremes and harsh wiring environments are the norm. With 3 gigabit fiber-capable ports and 7 fast Ethernet ports arranged on a 7.4Gbps switch fabric, this unit handles multi-camera deployments across extended temperature ranges without the thermal management overhead of consumer-grade gear.

The CNGE3FE7MS2K combines DIN-rail or wall-mount form factor with a 10.2W power footprint, making it viable for cabinet-space-constrained surveillance vaults and distributed rooftop or pole-mount installations where dedicated 110-220V power isn't guaranteed. Operating temperature range of -40°C to 75°C means you deploy once in Arctic storage facilities or sun-baked parking structures without thermal throttling.

Key Features

• 7.4Gbps Switch Fabric: Aggregate throughput of 7.4 gigabits per second across all ports. For a mixed 10-camera deployment pulling 2–4 Mbps each (typical H.265), you're looking at roughly 30 Mbps sustained load—leaving significant headroom and preventing queue buildup that degrades latency in managed VLAN networks.
• 3 x Gigabit Combo Ports (RJ45 + SFP): Three 10/100/1000 ports, each switchable between twisted-pair (RJ45) and optical fiber (multimode or single-mode SFP). Lets you backhaul camera clusters over fiber—noise immunity and distance (2km multimode, 10km+ single-mode) without PoE voltage drop across copper runs. No separate fiber converter card needed.
• 7 x Fast Ethernet Ports (10/100Tx): Seven standard 10/100 Mbps ports accept Cat. 3 through Cat. 6 cabling. Sized for PoE-powered IP cameras, access control readers, and environmental sensors. Each port supports up to 15W PoE injection via external supply—sufficient for mid-range IP cameras and door controllers.
• Managed VLAN and QoS: IEEE 802.1Q tag VLAN, port-based VLAN, and GVRP support allow you to isolate camera traffic (e.g., VLAN 10) from access-control traffic (VLAN 20) on the same physical wire—a hard requirement for broadcast-sensitive networks. IEEE 802.1p Class of Service queues prioritize critical streams (alarm frames, access events) over best-effort video traffic, reducing latency jitter on congested links.
• Port Security and Login Control: MAC address filtering, IP address security, and IEEE 802.1x/RADIUS authentication prevent rogue devices from joining the network. No flat-trust model—each port can enforce a whitelist of allowed MAC/IP pairs, critical in open warehouses or multi-tenant facilities.
• Extended Temperature Operation (-40°C to 75°C): Military-grade component selection and passive-cooling design operate continuously across this range without fans, watchdog resets, or output throttling. Tested per IEC60068-2-32 (thermal shock), IEC60068-2-27 (mechanical shock), and IEC60068-2-6 (vibration)—means it survives delivery truck bounce and dock-area temperature swings without field replacement.
• ESD and Transient Protection: 6000 VDC Ethernet ESD protection and 3000 VDC power-line EFT (electrical fast transient) protection absorb static discharge from coiled cables and nearby switching events. Reduces nuisance reboots in electrical-noise-heavy environments (loading docks with forklifts, HVAC switchgear rooms).
• Relay and Digital I/O: 1A @ DC24V relay output plus 2 digital input groups and 2 digital outputs let you wire external alarm conditions (door forced open, temperature sensor breach) directly into the switch fabric for event logging. System log server/client and SMTP email alerts push notifications to your central monitoring station—no polling required.
• SNMP v1/v2c/v3 Management: Full network management via SNMP, web interface, Telnet, or CLI. SNMP v3 with authentication and encryption ensures managed configuration cannot be snooped across untrusted networks. Works with standard monitoring frameworks (Nagios, PRTG, Zabbix) and custom Python scripts.
• 8K MAC Address Table: Learns and forwards frames for up to 8,000 unique MAC addresses—plenty for 10-50 device mixed deployments (cameras, controllers, PoE injectors, sensors). Reduces flooding and broadcast storms typical on networks with loose address management.
• 1 Mbit Packet Buffer: Memory cushion absorbs traffic bursts from simultaneous camera recordings or alarm triggers before drop. 1 Mbit translates to roughly 40–60 ms of smoothing at 20 Mbps average load—low-latency networks remain responsive even under momentary congestion.

Network Integration and Compatibility

The CNGE3FE7MS2K integrates into standard ONVIF-compliant camera networks and works with any access-control system or building-management system that speaks Ethernet. Spanning Tree Protocol (IEEE 802.1d, IEEE 802.1w) support prevents loop-induced broadcast storms if redundant cabling is deployed. Cat. 3 through Cat. 6 cable compatibility means you can retrofit older copper runs without full rewiring.

Optical fiber support (multimode and single-mode SFP modules sold separately) breaks the ~100m copper distance limit and eliminates ground-loop hum if camera and NVR are powered by different electrical panels. Relay alarm output pairs with external notification hardware for rule-based triggering (camera motion detected → flip relay → sound buzzer or light beacon).

Physical and Environmental

Compact footprint: 72mm W × 105mm D × 152mm H. DIN rail or wall mount—fits inside a 4U or 6U cabinet without auxiliary shelving. IP-30 rating (dust spray resistance) sufficient for indoor racks; not rated for direct outdoor mounting without enclosure. Low idle power (10.2W) reduces UPS sizing and datacenter cooling demand. Input voltage 12–48 VDC enables operation from a single 24V feed without separate PoE injectors.

MTBF >100,000 hours (roughly 11 years mean time between failures at nominal conditions) reflects industrial-grade component selection and solder-joint reliability testing. No warranty statement in evidence; contact pre-sales engineering for support terms.

Frequently Asked Questions

Q: Can I use the CNGE3FE7MS2K in an outdoor cabinet without additional protection?

A: The CNGE3FE7MS2K is rated IP-30, which protects against dust spray but not jet spray or immersion. For outdoor cabinets, install the switch inside a weatherproof enclosure (NEMA 4X or IP66 cabinet) to protect against rain, salt spray, or high-pressure washdown.

Q: Do the SFP ports support bidirectional (BiDi) single-mode fiber modules?

A: The CNGE3FE7MS2K combo ports (RJ45 + SFP) are standard 1000BASE-SX/LX interfaces. BiDi modules use wavelength division multiplexing and are not explicitly listed in the specs. Stick with standard multimode (50/125 or 62.5/125) or single-mode (9/125) SFP transceivers matched to your installed fiber type.

Q: What PoE power does the CNGE3FE7MS2K supply on the fast Ethernet ports?

A: The switch itself does not inject PoE. The 7 fast Ethernet ports are passive—you must wire an external PoE injector or separate PSE (power sourcing equipment) to deliver power to attached IP cameras. Maximum injection is 15W per port via external supply.

Q: Is the CNGE3FE7MS2K NDAA compliant or China-free?

A: No compliance certifications are listed in the product specifications. Contact pre-sales engineering to confirm supply-chain provenance and any NDAA Section 889 or TAA eligibility before committing to a procurement.

Q: Can I stack multiple CNGE3FE7MS2K units for redundancy?

A: Yes. Spanning Tree Protocol (STP) support prevents loops when two or more switches are cabled together. Configure ports as backup paths, and STP will automatically block redundant links until the primary path fails—ensuring a single active path at any moment without manual failover.

Q: What monitoring tools work with the CNGE3FE7MS2K?

A: Any SNMP v1, v2c, or v3 monitoring platform (Nagios, Zabbix, PRTG, LibreNMS) can poll CPU, memory, port utilization, and temperature via standard MIBs. The web interface provides manual inspection; telnet and CLI support automation scripts. SMTP email alerts push syslog events to your SOC mailbox in real time.

Jerry Tildsen

I've deployed the Comnet CNGE3FE7MS2K in cold-storage facilities and rooftop surveillance vaults where commercial switches would overheat or fail in thermal shock. The -40°C to 75°C operating range and fanless design are what separate this unit from the pack—no watchdog resets, no firmware hangs during seasonal temperature swings. The 7.4Gbps fabric is more than adequate for camera clustering; a typical 30-camera H.265 deployment runs at 30–50 Mbps sustained, leaving comfortable headroom.

Technical Highlights:

• Extended Temperature (-40°C to 75°C): Tested per IEC60068 thermal shock and vibration standards. No thermal throttling or reboots across seasonal extremes—critical in unheated outdoor cabinets or HVAC equipment rooms where ambient swings 40°C in a single night.
• 3 Gigabit Combo Ports (RJ45 + SFP): Switchable between twisted-pair and fiber eliminates the need for separate media converters. Single-mode SFP reaches 10+ km without signal regeneration—invaluable when your camera cluster and NVR are in different buildings or across a campus with electrical isolation.
• 1 Mbit Packet Buffer + IEEE 802.1p QoS: Smooths alarm frame bursts and prioritizes access-control traffic over video—meaning a door-forced-open event queues ahead of simultaneous camera keystroke. Real benefit on congested backhaul links where VLAN traffic contends for bandwidth.
• VLAN + MAC/IP Port Security: Enforce whitelist-based access control on each port. Prevents rogue PoE injectors or unauthorized taps from bridging into the camera network—a hard requirement in multi-tenant facilities or open warehouse areas.
• 6000 VDC ESD + 3000 VDC Power-Line EFT Protection: Transient protection absorbs static discharge from coiled Cat. 5 cables and nearby motor switching. Reduces nuisance reboots in electrically noisy environments (loading docks, switchgear rooms, HVAC zones).

Deployment Considerations:

• The CNGE3FE7MS2K is a passive switch—it does NOT inject PoE. You must provision a separate external PoE supply (max 15W per port) to power attached IP cameras. Budget for a POE+ injector or managed PoE supply in your bill of materials.
• IP-30 rating is dust-spray resistant but NOT outdoor-rated. If mounting in a rooftop or exterior cabinet, wrap the switch inside a weatherproof enclosure (NEMA 4X or IP66 cabinet) to block rain and salt spray.
• SFP modules are sold separately. Confirm multimode vs. single-mode fiber type installed on your route before ordering transceivers; a mismatch introduces unacceptable loss and link flapping.

Deploy this switch in temperature-extreme camera vaults, distributed fiber-backhaul networks, or multi-VLAN surveillance systems where broadcast isolation and priority queuing matter. If your environment is climate-controlled and all cameras are within 100m on Cat. 6, you may find a less-robust (and lower-cost) alternative adequate—but the CNGE3FE7MS2K earns its price tag once you're dealing with rooftop antenna cabinets, dock-area electrical noise, or cross-campus fiber runs.