Comnet SINGLE MODE 10GB 1550NM 40KM 2 FIBER LC WITH DDM - SFP-10G-ER

Comnet SFP-10G-ER 10Gbps Single-Mode Fiber Module

Overview

The Comnet SFP-10G-ER is a single-mode SFP+ transceiver rated for 10 Gigabit Ethernet over extended distances — specifically designed to move video, access control, and telemetry across long-haul fiber links in surveillance and industrial automation networks. At 1550 nm wavelength with 40 km reach, this module bridges remote facilities (parking structures, perimeter compounds, utility substations, distributed warehouses) on a single pair of optical fibers without repeaters or intermediary equipment.

The SFP-10G-ER (often searched as SFP 10G ER) supports dual fiber operation over standard singlemode cable and carries digital diagnostic monitoring (DDM) built in — meaning you can monitor optical power, temperature, and transceiver health without external test equipment. MSA compliance ensures interchangeability with third-party chassis and line cards that accept standard SFP+ pluggables.

Key Features

• 10 Gigabit throughput: Pushes 10,000 Mbps per fiber pair — enough bandwidth for multiple H.265 camera streams, redundant control channels, and telemetry on a single optical link. Compare this to gigabit modules (1 Gbps): you're gaining 10x headroom for future growth without re-cabling infrastructure.
• 1550 nm wavelength with 40 km range: The 1550 nm band (extended reach, also called ER — extended range) cuts optical attenuation in singlemode fiber, allowing 40 km end-to-end without regeneration. For context: 1310 nm modules top out around 10–15 km. This wavelength is industry standard for long-haul telecom and utility networks, so spare inventory and repair parts are widely available.
• Dual-fiber singlemode architecture: Uses two separate optical strands (one transmit, one receive) over standard LC connectors. Singlemode fiber has a much smaller core (8–10 µm versus 50 µm for multimode) and supports longer distances with less signal degradation. If you're running existing singlemode backbone fiber between buildings or across a campus, this module locks directly into that infrastructure.
• LC optical connectors: Smaller, latching connectors standard in carrier and industrial deployments. LC is field-friendly — lower insertion loss than older ST or SC connectors, and the latch prevents accidental disconnects during vibration or maintenance.
• Digital Diagnostic Monitoring (DDM): Reads back real-time optical transmit and receive power, module temperature, and voltage via the management interface. No need for inline power meters; network management software or CLI can poll DDM values to catch dirty lenses, aged components, or fiber stress before signal drops below threshold.
• Industrial hardened, no field adjustments: Designed to operate in temperature extremes, vibration, and harsh environments typical of utility substations, railway infrastructure, and outdoor equipment cabinets. No potentiometers, no calibration screws — it arrives pre-tuned and stays stable across operating life.
• IEEE 802.3 compliant, MSA certified: Meets standard SFP+ electrical and optical specs. MSA (Multi-Source Agreement) certification confirms it will work in any standards-compliant SFP+ slot — Comnet switches, third-party merchant hardware, or carrier-grade line cards.
• Limited lifetime warranty: Comnet backs the module with their standard limited lifetime warranty, covering manufacturer defects and component failure under normal operating conditions.

Integration & Compatibility

The SFP-10G-ER plugs into any SFP+ cage on Ethernet switches, media converters, or router interfaces that support singlemode optical modules. Typical deployments pair this with a hardened managed switch (like the Comnet CNGE11FX3TX8MS, which carries two SFP slots and eight copper ports for local camera and sensor connections) or with fiber-to-copper media converters at remote sites. The DDM telemetry integrates with SNMP-based network monitoring software, allowing you to track optical health across your entire fiber ring or mesh.

For surveillance backbone networks, pair the SFP-10G-ER with singlemode patch cord rated for 1550 nm and ensure all intermediate fiber (building trunks, outdoor runs) is also singlemode. Multimode fiber will work but wastes range and bandwidth; chromatic dispersion in long multimode runs causes signal degradation at 10 Gbps speeds.

Frequently Asked Questions

Q: What is the maximum cable distance with the SFP-10G-ER?

A: 40 km (approximately 131,000 feet) over standard singlemode fiber at 1550 nm. This is the extended-reach specification; actual distance depends on cable quality, splice count, and connector loss. If your run exceeds 40 km or includes marginal fiber, test with optical power meter before live deployment.

Q: Can I use multimode fiber with the SFP-10G-ER?

A: Technically yes, but not recommended. Multimode fiber introduces modal dispersion that compounds at 10 Gbps speeds, especially over distances beyond a few kilometers. Stick to singlemode for this module to achieve the rated 40 km range and error-free operation.

Q: Does the SFP-10G-ER support auto-negotiation or require manual configuration?

A: SFP+ modules are fixed at their rated speed and do not auto-negotiate. The SFP-10G-ER operates at 10 Gbps only. Ensure your host equipment (switch, line card, converter) is configured for 10 Gbps operation, not autonegotiate.

Q: How do I monitor the health of the SFP-10G-ER in the field?

A: Digital Diagnostic Monitoring (DDM) is built in. Access DDM telemetry via SNMP queries to the host switch or via CLI on the equipment housing the module. Typical monitored values include transmit optical power (TX power), receive optical power (RX power), module temperature, and supply voltage. Degrading RX power usually indicates fiber contamination, connector loss, or component aging.

Q: What wavelength should I order for long-distance outdoor runs?

A: The SFP-10G-ER at 1550 nm is the right choice for 40+ km distances. If your run is under 10 km and cost is primary, a 1310 nm module may suffice; 850 nm (short-reach) is limited to a few hundred meters and is not suitable for inter-building or inter-campus links.

Q: What warranty does the SFP-10G-ER carry?

A: Limited lifetime warranty covering manufacturer defects and component failures under normal operating conditions.

Eden Phillips

I've deployed the SFP-10G-ER across utility and campus surveillance networks where distance and single-pair fiber efficiency matter. The 1550 nm wavelength at 40 km range keeps you independent of intermediate regenerators — a real cost and reliability win when you're bridging substations or distributed warehouse complexes. The SFP-10G-ER is MSA certified and truly plug-and-play: no jumpers, no attenuators, no field tweaking. Insert it into any standards-compliant SFP+ slot, patch in your singlemode fiber, and it locks at 10 Gbps. The DDM telemetry is the hidden gem here; it lets you catch fiber stress, connector contamination, or aging optics before they cause signal loss in your video feeds.

Technical Highlights:

• 1550 nm extended-reach wavelength: 40 km end-to-end without repeaters — singlemode fiber's narrow 8–10 µm core eliminates modal dispersion that would degrade 10 Gbps signals on multimode. This wavelength is standard in telecom and utility backbones, ensuring spare parts and repair inventory are available globally.
• Dual-fiber LC singlemode architecture: Two separate optical strands (TX/RX) over latchable LC connectors rated for field handling. LC connectors reduce insertion loss compared to older ST/SC, and the latch prevents accidental disconnects during vibration or outdoor cabinet maintenance — a real concern in utility or railway deployments.
• Digital Diagnostic Monitoring (DDM): Real-time optical transmit and receive power, module temperature, and voltage accessible via SNMP or CLI. Lets you spot degrading signal (fiber contamination, aging components, splice loss) before it cascades into dropped frames on your surveillance backbone.

Deployment Considerations:

• Singlemode fiber is mandatory for the full 40 km range; multimode introduces modal dispersion at 10 Gbps speeds and will cut your effective distance to a few kilometers. If you're retrofitting into existing multimode infrastructure, upgrade the fiber first or select a lower-speed module.
• SFP+ modules do not auto-negotiate speed. Ensure the host equipment (switch, line card, media converter) is explicitly configured for 10 Gbps operation, not autonegotiate mode. A mismatch leaves you with no link, which is easy to overlook during initial testing.
• DDM readings require SNMP or CLI access to the host device. Not all network management platforms display DDM by default; verify your VMS or NMS supports optical telemetry polling before you deploy blind monitoring into a remote cabinet.

For long-haul surveillance backbones, utility SCADA networks, and distributed warehouse automation where you need 10 Gbps bandwidth over 40+ km on a single fiber pair, the SFP-10G-ER eliminates the repeater complexity and cost that plague older gigabit systems. If your run is under 10 km and budget is tight, a 1310 nm module drops cost while still offering solid performance; but if you're building infrastructure to last and distance is a factor, this module earns its place.