GLC-SX-MMD (Cisco 1000BASE-SX SFP Transceiver Module, 850nm/550m/MMF/LC/DOM)

GLC-SX-MMD uses the Small Form-Factor Pluggable form factor for insertion into compatible Gigabit Ethernet module sockets and network equipment slots. Its electrical-to-optical interface carries 1 Gbps traffic on the 1000BASE-SX link specification for Gigabit Ethernet signaling operations. The optical path uses multi-mode fiber as the physical medium for installed links across supported core sizes and bandwidth grades. Dual LC/PC optical connectors present transmit and receive strands using PC or UPC patch cords. The transmit and receive optical wavelength operates in the 850 nm short-wavelength band used by 1000BASE-SX optics. Maximum reach extends to 550 m on 50-micron cable with 500 MHz*km modal bandwidth for compliant channel operation. Cisco assigns the Extended operating temperature class to this SFP for supported Cisco platforms. Digital Optical Monitoring support provides real-time operating parameter access for link diagnostics through host management interfaces.

With VCSEL transmitter technology, GLC-SX-MMD generates the optical source required for serial signaling over installed channels. The PIN receiver converts incoming optical signals into electrical receive data for the host interface across the receive side. TX power range delivers -9.5 dBm minimum to -3 dBm maximum across the 1000BASE-SX optical output during normal operation. RX sensitivity reaches -17 dBm at the lowest receive power value in the specified receive range for guaranteed operation. With 8b/10b encoding, the line code maps eight-bit data groups into ten-bit transmission symbols for 1000BASE-X operation. RX overload point accepts 0 dBm as the maximum receive power value before receiver saturation under the optical parameters. IEEE 802.3z, IEEE 802.3ah, and SFF-8472 govern Ethernet operation, physical-layer compatibility, and diagnostic monitoring requirements. With 3.1 to 3.5 V supply voltage range, the module runs from the SFP host electrical power rail. At 1 W maximum power consumption, the port budget matches the typical SFP power requirement per interface.

Compatible platform families span Cisco Catalyst 2960-X, Catalyst 3560, Catalyst 3850, Catalyst 4500, Catalyst 6800, and Nexus 9000 Series. Additional platform families span Cisco ASR 1000, ASR 9000, ASA5500, MDS 9000, ME 3400, and NAM 2200 Series. Deployment environments place the module in enterprise campus access, distribution uplinks, wiring closets, and data center aggregation rows. OM2 cable grade matches the required grade for the stated channel distance in standard installed channels. Shop GLC-SX-MMD online from ORM Systems in new and certified refurbished condition. Certified refurbished stock passes ORM Systems inspection and functional testing before shipment. Check price with ORM Systems for current stock, lead time, and procurement-ready purchasing support. ORM Systems supplies purchase support for refresh projects, network expansions, maintenance spares, and lifecycle replacement planning. Price requests with ORM Systems align project quantities, sparing needs, and replenishment orders. Request bulk quotation from ORM Systems for enterprise and volume buyers.