Alistar 1G 1000BASE-SX Optical SFP Module for Multimode Fiber, MMF, LC Duplex, 550 m, 850 nm, DDM

The Alistar 1G 1000BASE-SX optical SFP module is designed for building high-speed Gigabit Ethernet networks using multimode optical fiber. The module provides data transmission at speeds of up to 1 Gbps over distances of up to 550 meters and supports the 1000BASE-SX standard.

The transceiver operates at a wavelength of 850 nm and is equipped with an LC Duplex connector for dual-fiber connections. Support for DDM (Digital Diagnostic Monitoring) enables real-time monitoring of the module’s key operating parameters through compatible network equipment.

Main advantages

• Data rate up to 1 Gbps — supports the 1000BASE-SX Gigabit Ethernet standard.
• Transmission distance up to 550 m over multimode optical fiber.
• LC Duplex connector — reliable dual-fiber optical connection.
• 850 nm operating wavelength — an efficient solution for short- and medium-distance optical links.
• DDM support — monitoring of temperature, voltage, laser current, and optical signal levels.
• Hot-swappable design — installation and replacement without shutting down compatible equipment.
• Broad compatibility — suitable for switches, routers, and media converters with an SFP port.

Operating principle

The module supports the 1000BASE-SX standard and provides bidirectional data transmission over two multimode optical fibers through an LC Duplex interface. Signal transmission and reception are carried out at a wavelength of 850 nm.

This type of connection is ideal for optical links inside buildings, server rooms, data centers, and corporate networks.

DDM function

Digital Diagnostic Monitoring allows the following parameters to be monitored:

• transceiver temperature;
• supply voltage;
• laser bias current;
• transmitted optical power;
• received optical signal level.

Monitoring these parameters simplifies network diagnostics and helps detect deterioration in optical link quality in time.

Applications

• Gigabit Ethernet local area networks;
• server rooms and data centers;
• connections between network switches;
• Gigabit media converters;
• corporate networks;
• IP video surveillance systems;
• industrial data transmission networks.

Technical specifications

Connection recommendations

1. Install the SFP module in a compatible SFP port on a switch, router, or media converter.
2. Use a multimode fiber-optic patch cord with LC Duplex connectors.
3. Install a compatible 1000BASE-SX module at the opposite end of the link.
4. Check the link indicator and DDM parameters after installation.

Frequently asked questions

Which optical cable should be used?

A multimode optical fiber and an LC Duplex fiber-optic patch cord are required.

Can the module be used with a media converter?

Yes, provided that the media converter has a Gigabit SFP port and supports the 1000BASE-SX standard.

Which module is required at the opposite end?

A compatible 1G 1000BASE-SX SFP module operating at 850 nm should be installed at the opposite end of the link.

What is DDM used for?

DDM allows the module’s key operating parameters and the condition of the optical link to be monitored through compatible network equipment.

Does the module support hot swapping?

Yes. The module can be installed or replaced without shutting down compatible network equipment.

The Alistar 1G 1000BASE-SX optical SFP module with an LC Duplex connector and an 850 nm wavelength is a reliable solution for building Gigabit networks over multimode optical fiber at distances of up to 550 meters. DDM support simplifies optical link monitoring, diagnostics, and maintenance.