Electronics / Monitors
1000BASE-LX SFP 1310nm 20km DOM Transceiver
High-performance 1000BASE-LX SFP transceiver designed for 1.25Gbps data rates over single-mode fiber up to 20km, featuring digital diagnostic monitoring and hot-pluggable capability.
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The 1000BASE-LX SFP 1310nm 20km DOM Transceiver is a high-performance, small form-factor pluggable module designed for bi-directional serial optical data communications. It is specifically engineered for Gigabit Ethernet 1000BASE-LX and Fiber Channel applications. The module utilizes a 1310nm multiple quantum well laser and is compliant with Class 1 laser safety standards (IEC-60825). It supports hot-plugging, allowing for easy installation and replacement without powering down the host equipment.
Key Features
- Operating data rate up to 1.25Gbps.
- Transmission distance up to 20km over 9/125 µm single-mode fiber.
- Built-in digital diagnostic functions (DOM) for real-time optical power monitoring.
- Compliant with MSA SFP specifications and SFF-8472 standards.
- Single 3.3V power supply with TTL logic interface.
- Available in commercial, extended, and industrial temperature ranges.
Installation and Operation
The transceiver is designed for use in Gigabit Ethernet switches, routers, and fiber channel infrastructure. It features a standard duplex LC connector interface. The module is hot-pluggable, meaning it can be inserted into an SFP port while the host device is operational. Ensure that the fiber optic cables are clean and properly connected to the LC interface to maintain signal integrity. The module includes a TX_Disable feature, which can be used to shut down the transmitter optical output when necessary.
Safety and Maintenance
This device is a Class 1 laser product. Always handle optical components with care to avoid contamination of the fiber end-faces. The module is designed for long-term reliability and has been tested under various environmental conditions, including thermal shock, to ensure stable performance. If you experience a loss of signal (LOS), verify that the received optical power is within the specified sensitivity range. The module provides an LOS output signal that indicates when the received power falls below the worst-case receiver sensitivity threshold.
Technical Compliance
The transceiver is fully compliant with IEEE 802.3z and ANSI Fiber Channel standards. It has undergone rigorous testing in the FS Assured Program to ensure compatibility with a wide range of network equipment from over 200 vendors, including Cisco, Brocade, Dell, and Huawei. The module's electrical and optical characteristics are strictly controlled to meet industry requirements for jitter, extinction ratio, and receiver sensitivity.
Manufacturer information
FS.com
Practical help
Common problems
Loss of Signal (LOS)
Check if the received optical power is below the receiver sensitivity threshold. Ensure fiber connections are clean and secure.
Transmitter Fault
Verify the TX_Fault pin status. If high, it indicates a laser fault; ensure the module is properly seated and within operating temperature.
Before use
- Verify the host device SFP port supports 1000BASE-LX.
- Ensure the fiber optic cable is 9/125 µm single-mode fiber.
- Clean the fiber connector end-faces before insertion.
- Check that the module temperature range matches the operating environment.
- Ensure the host device is powered on and the SFP slot is configured.
Specs in practice
- Supply Voltage
- The required operating voltage for the module, nominal 3.3V.
- Center Wavelength
- The optical wavelength used for transmission, centered at 1310nm.
- Receiver Sensitivity
- The minimum optical power required for the receiver to maintain a specified bit error rate.
Images and diagrams
- The pin description diagram shows the 20-pin SFP interface layout.
- Pins are categorized into ground, power, data input/output, and control signals.
- The LOS Hysteresis diagram illustrates the threshold levels for signal loss detection.
- Mechanical drawings provide precise dimensions for the SFP module housing.
Model compatibility
- Tested for compatibility with over 200 vendors including Cisco, Brocade, Dell, and Huawei.
- Compliant with MSA SFP and SFF-8472 standards.
- Designed for use with 9/125 µm single-mode fiber.
Manual page author
Michael Turner
Technical manual editor
Reviews PDF manuals for structure, safety notes, and practical product details so readers can find the right information quickly.