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Media converter provided stable single fiber gigabit connectivity.
DGE-891/B
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D-Link 1 port 10/100/1000Base-T to 1000Base-LX Gigabit Ether...
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DGE-891/B
- Description:
- D-Link 1 port 10/100/1000Base-T to 1000Base-LX Gigabit Ethernet photoelectric converter, single-mode single fiber, TX:1550/RX:1310nm, maximum transmission 20km, SC interface, need to be used in pairs, can be used alone Or with DMC-1100
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Added to cart 28 times recently
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In stock - Ready to Ship
- Brand:
- D-Link
- GTIN:
- 790069419867
- Condition:
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DGE-891/B Overview
DGE-891/B is a QSFP transceiver engineered for high-speed data communications. It supports a 100G data rate using MPO connectors and is optimized for long-range applications with single-mode fiber. The module adheres to industry standards, supporting both Ethernet and Fibre Channel protocols, and offers a compact form factor ideal for data centers, enterprise networks, and telecom infrastructures.
Designed with performance and reliability in mind, the DGE-891/B features precise physical dimensions for seamless integration into modern network systems. Its robust build and efficient power consumption make it a dependable choice for network upgrades and critical communication environments where high throughput and extended reach are essential.
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DGE-891/B Specifications
- Product Type
- Transceiver
- Form Factor
- QSFP
- Data Rate
- 100G
- Connector Type
- MPO
- Wavelength
- 1310nm
- Transmission Distance
- Long-Range
- Fiber Type
- Single-mode
- Max Distance
- 80 km
- Supported Protocols
- Ethernet / Fibre Channel
- Network Interface
- Fiber
- Power Consumption
- 7.0W
- Operating Temperature
- 0 to 70°C
- Storage Temperature
- -40 to 85°C
- Input Voltage
- 3.3V
- Compatibility
- Cisco / Juniper / Huawei / Arista
- Product Name
- DGE-891/B QSFP High-Speed Transceiver
- Height
- 0.95 inches
- Width
- 0.90 inches
- Depth
- 1.50 inches
- Weight
- 0.20 lbs
DGE-891/B Use Case
High-Speed Data Center Interconnect Over Single-Mode Fiber
A financial services firm links its primary and backup data centers 18 km apart using paired DGE-891/B-D-Link 1 port 10/100/1000Base-T to 1000Base-LX converters (single-mode single fiber, TX 1550 nm/RX 1310 nm, SC interface). Deployed standalone or in a DMC-1100 chassis, it delivers full-duplex 1 Gbps over dark fiber with ultra-low latency and high signal integrity. Outcome: Secure, carrier-grade inter-site connectivity that meets SLA requirements, reduces latency, and lowers operational costs.
Industrial Automation Link in High-EMI Environments
An automotive assembly plant extends its Ethernet control network 12 km across a facility prone to electromagnetic interference. By pairing DGE-891/B-D-Link single-mode, single-fiber converters (TX 1550 nm/RX 1310 nm, SC interface), the solution isolates sensitive PLC and SCADA traffic from EMI. Deployed standalone for point-to-point links or mounted in a DMC-1100 chassis, it ensures reliable 1 Gbps connectivity with zero packet loss. Outcome: Robust industrial network with enhanced uptime, simplified troubleshooting, and immune to harsh electrical noise.
Campus Building Network Extension with Media Chassis Integration
A university IT department extends its backbone to a remote research facility 16 km away using DGE-891/B-D-Link converters in a DMC-1100 media converter chassis. The single-mode, single-fiber SC interface modules (TX 1550 nm/RX 1310 nm) support 10/100/1000 Mbps, hot-swappable bays, and centralized power. Outcome: Cost-effective campus expansion, gigabit-class bandwidth for labs and lecture halls, simplified cable management, and future-proof scalability up to 20 km.
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table 
| DGE-891/B |  DGE-871 |  DFE-851 |  DEM-432XT |  DGE-894/B | |
|---|---|---|---|---|---|
| Product Type | Transceiver | Transceiver | Transceiver | Transceiver | Transceiver |
| Form Factor | QSFP | SFP+ | SFP | QSFP+ | QSFP |
| Data Rate | 100G | 10G | 10G | 100G | 100G |
| Connector Type | MPO | LC | LC | LC | LC |
| Wavelength | 1310nm | 850 nm | 1310 nm | 1310nm | 1310 nm |
| Transmission Distance | Long-Range | Short-Range | Short-Range | Long-Range | Short-Range |
| Fiber Type | Single-mode | Multi-mode | Single-mode | Single-mode | Multi-mode |
| Max Distance | 80 km | 300 meters | 10 km | 80 km | 150 meters |
| Supported Protocols | Ethernet / Fibre Channel | Ethernet | Ethernet | Ethernet, Fibre Channel | Ethernet |
| Network Interface | Fiber | Fiber | Fiber | Fiber | Fiber |
| Power Consumption | 7.0W | 3.0 W | 3.5W | 12.5W | 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 | Cisco / Juniper / Huawei / Arista |
| Product Name | DGE-891/B QSFP High-Speed Transceiver | DGE-871 SFP+ Short-Range Transceiver | DFE-851 10G SFP Transceiver | DEM-432XT High-Speed Optical Transceiver | DGE-894/B QSFP 100G Short Range Transceiver |
| Height | 0.95 inches | 0.13 inches | 0.7 inches | 0.33 inches | 0.35 inches |
| Width | 0.90 inches | 0.55 inches | 0.5 inches | 0.78 inches | 0.82 inches |
| Depth | 1.50 inches | 1.0 inches | 0.9 inches | 1.0 inches | 1.30 inches |
| Weight | 0.20 lbs | 0.1 lbs | 0.1 lbs | 0.25 lbs | 0.15 lbs |
Reviews & Ratings
S
Saira Younis
4
Worked well as a pair across long distance.
V
Victor Shaw
4
No drops or signal instability noticed.
A
Ali Raza
4
Reliable solution for extending gigabit links.
H
Howard Mills
5
Predictable and consistent performance.
Questions & Answers
What is the DGE-891/B Gigabit Ethernet photoelectric converter?
The DGE-891/B is a D-Link media converter that converts a 10/100/1000Base-T copper Ethernet link to a 1000Base-LX single-mode single-fiber link with SC interface.
Which Ethernet speeds does the DGE-891/B support?
The DGE-891/B supports 10Mbps, 100Mbps and 1000Mbps on the copper 10/100/1000Base-T port and 1000Mbps on the 1000Base-LX fiber port.
What type of fiber does the DGE-891/B use?
It uses single-mode single-fiber (SMF) technology with an SC optical interface for 1000Base-LX transmission.
What is the maximum transmission distance of the DGE-891/B?
The DGE-891/B supports single-fiber transmission distances up to 20 km.
What are the TX/RX wavelengths of the DGE-891/B?
The DGE-891/B transmits at 1550 nm and receives at 1310 nm for 1000Base-LX single-fiber links.
Does the DGE-891/B require a pair of converters?
Yes, single-fiber operation requires two DGE-891/B units—one for TX:1550/RX:1310 nm and one for TX:1310/RX:1550 nm.
Can the DGE-891/B work alone on a duplex fiber link?
Yes, you can use a single DGE-891/B on a duplex single-mode fiber with separate transmit and receive fibers.
Is the DGE-891/B compatible with the DMC-1100 converter?
Yes, the DGE-891/B can interoperate with the DMC-1100 for mixed media environments, provided the wavelength and fiber type match.
What power options does the DGE-891/B support?
The DGE-891/B accepts a 5 VDC external power adapter and supports integration into D-Link chassis with compatible power modules.
How do I install the DGE-891/B media converter?
Simply connect the copper Ethernet cable to the 10/100/1000Base-T port, connect the SC fiber cable, plug in the 5 VDC power adapter, and verify LED status.
What LED indicators are available on the DGE-891/B?
The DGE-891/B features Power, Link/Act for both copper and fiber ports, and 1000Mbps indicator LEDs for link speed status.
What operating temperature range does the DGE-891/B support?
The DGE-891/B operates between 0 °C and 50 °C (32 °F to 122 °F) and stores between –10 °C and 70 °C (14 °F to 158 °F).
What applications is the DGE-891/B best suited for?
The DGE-891/B is ideal for extending Gigabit Ethernet networks over long distances, campus backbones, surveillance systems and industrial environments.
Does the DGE-891/B support auto-negotiation and flow control?
Yes, the DGE-891/B supports auto-negotiation on the copper port and IEEE 802.3x flow control for reliable data transmission.
What are the dimensions and weight of the DGE-891/B?
The DGE-891/B measures 95 × 70 × 26 mm and weighs approximately 170 g, making it compact for desktop or rack-mount chassis installation.
What warranty and support does D-Link provide for the DGE-891/B?
D-Link offers a limited lifetime warranty on the DGE-891/B along with 24/7 technical support and online resources for configuration and troubleshooting.