About GLC-SX-MM
GLC-SX-MM SFP transceivers are high performance modules that support a data-rate of 1.25Gbps and can transmit data up to 550m over multi-mode fiber.GLC-SX-MM is 1000Base-SX SFP fiber optic transceiver for multimode fiber and it works at 850nm wavelength, Cisco GLC-SX-MM SFP is compatible with IEEE 802.3z and could reach 550 meter working distance via 50/125 multimode fiber, on 62.5/125 multimode fibers it could reach 220 meters. GLC SX MM SFP is hot swappable module that fit for Gigabit Ethernet port or slot and link the port with the network, GLC SX MM is about 1.3 cm x 5.7 cm x 0.9 cm in dimension, and 75g in weight.

The features of GLC-SX-MM
Interfaces/Ports: 1 x 1000Base-SX
Interfaces/Ports Details: 1 x LC Duplex Connector 1000Base-SX
Dimensions: 0.33" Height x 0.53" Width x 2.22" Depth
Up to 1.25Gb/s bi-directional data links
Duplex LC Connectors
Hot-pluggable SFP footprint
Built-in digital diagnostic functions
850nm VCSEL laser transmitter
Up to 550m on 50/125μm MMF
Metal enclosure for lower EMI
Single 3.3V power supply
Low power dissipation <700mW typical

Applications of GLC-SX-MM
Gigabit Ethernet between switches, from switches to Wireless LAN Controllers, between switches and firewalls.
Fiber Channel – Connecting servers to NAS or SAN devices.

GLC-SX-MM is the upgrade version of WS-G5484
GLC-LH-SM uses the 1310nm SMF which upto 10km distance but it usually more expensive, the GLC-SX-MM SFP transceiver can treat as the upgrade version of the GBIC transceiver WS-G5484. and the SFP+ transceiver SFP-10G-SR is called SFP plus transceiver which it is not only the upgrade version of GLC-SX-MM but also develop the fiber optic network to a new level withXENPAK transceiver, XFP transceiver, X2 transceiver.