Overview of 1000BASE-SX SFP Transceiver Module
Ever since the Gigabit Ethernet has been applied to the telecommunication network, SFP transceivers’ footprints cover more and more places, of which the 1000BASE-SX SFP transceiver module plays a vital role in it. We have introduced several types of SFP transceivers in the previous passages. Today we are continuing to talk about 1000BASE-SX SFP transceiver module.
It may strike you odd about the term — 1000BASE-SX. A short profile will be shown to you. The 1000BASE-SX is one of the physical layer standards for Gigabit Ethernet, meaning the single optic fiber 1000Mbps baseband transmission standard. “S” refers to short-range multi-mode optical cable, while “X” means 4B/5B block coding for Fast Ethernet or 8B/10B block coding for Gigabit Ethernet. The standard specifies a transmission distance between 220 metres (62.5/125 µm fiber with low modal bandwidth) and 550 metres (50/125 µm fiber with high modal bandwidth). It is highly popular for intra-building links in large office buildings, co-location facilities and carrier neutral internet exchanges. Therefore, 1000BASE-SX SFP transceiver module is the best seller in those fields.
The picture shows 1000BASE-SX SFP transceiver module.
The 1000BASE-SX SFP transceiver module is compatible with the 1000BASE-SX standard. It operates on legacy 50 μm multimode fiber links and It can support up to 1km over laser-optimized 50 μm multimode fiber cable. The wavelength range that 1000BASE-SX SFP transceiver module transmits and receives is from 770nm to 860nm.
GLC-SX-MM is Cisco 1000BASE-SX SFP transceiver module for multi-mode fiber. Cisco GLC-SX-MM is the SFP fiber optic transceiver module which operates on the 1000BASE-SX standard. It is the multimode module with a wavelength of 850nm. Cisco 1000BASE-SX SFP transceiver module supports hot-pluggable SFP footprint duplex LC connector Interface. This transceiver is built to comply with Multi-Source Agreement (MSA) standards. GLC-SX-MM supports dual data-rate of 1.25Gbps/1.0625Gbps, which is widely used in fiber channel links, Gigabit Ethernet links, Fast Ethernet links, other optical links.
Besides Cisco GLC-SX-MM, Cisco GLC-SX-MMD is also available in the market. They are the two similar models of Cisco 1000BASE-SX SFP. So, what’s the difference between them? As it implies in the word, obviously the letter “D” is the only difference between GLC-SX-MMD and GLC-SX-MM. “D” refers to DOM functionality. DOM stands for Digital Optical Monitoring, which is an widely used standard, intended to give the network administrator the ability to monitor real-time parameters of the SFP, such as optical output power, optical input power, temperature, laser bias current, and transceiver supply voltage.
It is pity that GLC-SX-MM SFP has been no longer for sale since 2013 in Cisco, which is completely replaced by GLC-SX-MMD. However, many users still choose to use GLC-SX-MM for the consideration of the costs and usage. Cisco GLC-SX-MMD is much more expensive than GLC-SX-MM, they nearly possess the same function in the switch except the additional DOM functionality. Fiberstore produces and stocks a variety of compliant Cisco GLC-SX-MM and Cisco GLC-SX-MMD with high quality and low prize. And we can also customize optic transceiver to fit your specific requirements. This passage is just a short introduction to 1000BASE-SX SFP transceiver module. If you have other opinions about this, please leave your comment.
