The GLC-SX-MM-RGD is a 1000BASE-SX SFP module designed for Gigabit Ethernet applications, supporting multimode fiber (MMF) with a transmission distance of up to 550 meters at 850nm wavelength. This Cisco-compatible transceiver features Digital Diagnostic Monitoring (DDM) and is suitable for use with ASR920, IE2000, and IE4000 series equipment.