General
Data rate	1,25 Gbit/s
Fibre type	50 micron multimode
Wavelength	850 nm
Connection	Duplex LC
Maximum distance	550 m
Operation temperature	-40 to +85 °C
Operating humidity	5 to 85 %
Maximum height	1800 m
Current supply	from SFP cage
Approvals	CE, FCC, TUV, UL
Warranty	1 year Double Diamond™
Hot-swap
Extended diagnostics
TAA compliance

The SFP transceiver from manufacturer BlackBox, type LFP411, is a modular optical transmit-receive module for use in data communication devices. It serves as a fiber transceiver with a data rate of 1.25 Gbit/s and is specifically designed for operation in networks using multimode glass fiber. The module enables a 1250-Mbps connection over multimode fiber with a wavelength range of 850 nm and is designed for a maximum reach of up to 550 meters. The connection is made via a duplex LC connector, which is widely used in IT infrastructure and ensures a secure, precise plug connection.

Applications
This transceiver is suitable for use in networks with high requirements for reliability and operational safety, particularly in environments with extreme temperatures. The operating temperature range of -40 °C to +85 °C makes it suitable for use in industrial facilities, outdoor applications, or climate and cooling systems. The maximum operating altitude of 1800 meters extends its application range to high mountain regions or tall buildings. The operating humidity of 5 % to 85 % (non-condensing) ensures stable operation in humid but non-condensing environments.

Functions and Equipment in Detail
A central feature of the module is the extended diagnostic function, which enables continuous monitoring of connection characteristics. This includes measurement of temperature, voltage, and signal strength. These data can be queried via the network device to monitor the connection status and detect potential faults early. The diagnostic function supports maintenance and troubleshooting in complex networks.

Technology Explained Simply
The module operates as an SFP transceiver, i.e., a Small Form-factor Pluggable module, which is inserted into SFP slots of switches, routers, or other network devices. Power supply is provided via the SFP cage, i.e., by the network device itself, so no external power source is required. The hot-swap function allows the module to be replaced without interrupting network operation, which is advantageous for network maintenance and scaling. The use of multimode fiber (50 micron) with 850 nm wavelength is typical for short to medium distances in local area networks (LAN).

Compatibility and Accessories
The module is compatible with SFP slots of most network devices that support the SFP transceiver standard. It is therefore a universally usable module for switches, routers, and other devices equipped with SFP ports. The certifications CE, FCC, TUV, and UL confirm compliance with applicable safety and EMC standards. TAA compliance (Trade Agreements Act) is also provided, which may be relevant for public procurements in certain countries.

Installation and Mounting
Installation is performed by simply inserting the module into the SFP slot of the network device. Due to the hot-swap function, this can also be done during operation without interrupting network traffic. The fiber connection is made via the duplex LC connector, which is connected to a corresponding LC connector cable. No additional tools or software are required.

Operational Advantages
The combination of extended diagnostics, hot-swap function, and wide operating temperature range makes the module particularly suitable for critical applications. Continuous monitoring of connection characteristics enables proactive network maintenance. High operational reliability in extreme environments and easy replaceability increase network availability and maintainability. Power supply via the SFP cage reduces the number of required connections and simplifies installation.

Warranty
The product is delivered with a 1-year warranty under the manufacturer’s Double Diamond™ guarantee, providing standard protection for operation.