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DFE-861/B
D-Link 1 port 10/100Base-TX to 100Base-FX 100M Ethernet phot...
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DFE-861/B is a 10G SFP optical transceiver designed for high-speed data communications over long distances. It features an LC connector and supports both Ethernet and Fibre Channel protocols, making it ideally suited for data centers, enterprise networks, and telecom applications. Its compact SFP form factor ensures easy integration into standard network equipment while delivering robust performance.
Engineered for reliable, high-speed connectivity, DFE-861/B offers transmission over single-mode fiber for distances up to 80 km. Its precise physical dimensions—designed to conform to standard SFP slot requirements—coupled with energy-efficient operation, make it an optimal solution for organizations seeking dependable long-range connectivity in demanding network environments.
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In a multi-building university campus, the IT team deployed a pair of DFE-861/B D-Link 1-port 10/100Base-TX to 100Base-FX photoelectric converters over single-mode, single-fiber (SC) spanning 18 km (TX: 1550 nm / RX: 1310 nm). This solution seamlessly extended the Ethernet backbone between the main data center and a remote lecture hall. Benefit: Achieved reliable 100 Mbps connectivity with zero electromagnetic interference, minimized network downtime, and eliminated costly fiber-optic switch upgrades.
A city transportation authority integrated high-definition CCTV along a light-rail corridor by installing paired DFE-861/B converters at the control room and field cabinets. Using single-mode single-fiber SC links at 1550 nm/1310 nm, they maintained a 20 km run. Benefit: Delivered uninterrupted 100 Mbps video streams with hardened 1 kV isolation for EMI immunity, ensuring real-time monitoring and rapid incident response without additional repeaters.
An offshore oil platform networked distributed sensors and PLC controllers via two DFE-861/B 100M Ethernet converters over a 15 km single-mode SC fiber link. The converters bridged the 10/100Base-TX copper segment to the 100Base-FX fiber backbone (TX: 1550 nm / RX: 1310 nm). Benefit: Enabled high-speed telemetry, immune to electrical noise and corrosive environments, resulting in precise real-time data acquisition, enhanced safety, and reduced maintenance costs.
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 DFE-861/B |  DFE-855 |  DGE-891/A |  DFE-851 |  DGE-894/B | |
|---|---|---|---|---|---|
| Product Type | Transceiver | Transceiver | Transceiver | Transceiver | Transceiver |
| Form Factor | SFP | SFP+ | SFP+ | SFP | QSFP |
| Data Rate | 10G | 10G | 10G | 10G | 100G |
| Connector Type | LC | LC | LC | LC | LC |
| Wavelength | 1310 nm | 1310 nm | 1310 nm | 1310 nm | 1310 nm |
| Transmission Distance | Long-Range | Long-Range | Long-Range | Short-Range | Short-Range |
| Fiber Type | Single-mode | Single-mode | Single-mode | Single-mode | Multi-mode |
| Max Distance | 80 km | 40 km | 80 km | 10 km | 150 meters |
| Supported Protocols | Ethernet, Fibre Channel | Ethernet | Ethernet | Ethernet | Ethernet |
| Network Interface | Fiber | Fiber | Fiber | Fiber | Fiber |
| Power Consumption | 3.5W | 1.5 W | 3.5W | 3.5W | 4.5W |
| Operating Temperature | 0 to 70°C | 0 to 70°C | 0 to 70°C | 0 to 70°C | 0 to 70°C |
| Storage Temperature | -40 to 85°C | -40 to 85°C | -40 to 85°C | -40 to 85°C | -40 to 85°C |
| Input Voltage | 3.3V | 3.3V | 3.3V | 3.3V | 3.3V |
| Compatibility | Cisco, Juniper, Huawei, Arista | Cisco / Juniper / Huawei / Arista | Cisco / Juniper / Huawei / Arista | Cisco, Juniper, Huawei, Arista | Cisco / Juniper / Huawei / Arista |
| Product Name | DFE-861/B Optical Transceiver Module | DFE-855 High Performance 10G SFP+ Transceiver | DGE-891/A High-Performance Long-Range 10G SFP+ Transceiver | DFE-851 10G SFP Transceiver | DGE-894/B QSFP 100G Short Range Transceiver |
| Height | 1.0 inches | 0.33 inches | 0.7 inches | 0.7 inches | 0.35 inches |
| Width | 2.0 inches | 0.65 inches | 0.6 inches | 0.5 inches | 0.82 inches |
| Depth | 0.5 inches | 2.35 inches | 1.2 inches | 0.9 inches | 1.30 inches |
| Weight | 0.2 lbs | 0.12 lbs | 0.05 lbs | 0.1 lbs | 0.15 lbs |
Single fiber fast Ethernet converter performed reliably across our campus link. Stable conversion and no packet loss issues.
Works well in pairs. Link stays stable over distance.
Good quality media converter for 100M fiber runs. Setup was quick.
Reliable SC connection and predictable performance in daily use.
Consistent conversion with minimal maintenance required.
The DFE-861/B is a 1-port 10/100Base-TX to 100Base-FX photoelectric converter featuring single-mode, single-fiber SC interface for extending Ethernet up to 20 km.
It converts copper Ethernet signals on the RJ-45 port to single-mode fiber signals on the SC port using 1550 nm TX and 1310 nm RX wavelengths for distances up to 20 km.
It supports one 10/100Base-TX RJ-45 port and one 100Base-FX SC single-mode fiber port.
The converter uses single-mode, single-fiber cable with an SC duplex connector for both transmit and receive.