SFP or Small Form-Factor Pluggable is the upgraded version of GBIC transceiver which is also called Mini GBIC. The industry-standard Cisco SFP Gigabit Interface Converter is a hot-swappable input/output device that plugs into a Gigabit Ethernet port or slot, linking the port with the network. The SFP transceivers are capable of supporting SONET, Gigabit Ethernet, Fibre Channel, and several other communications standards. Ingellen provide a variety of Cisco SFP transceivers that can be used and interchanged on a wide variety of Cisco products and can be intermixed in combinations of 1000BASE-T, 1000BASE-SX, 1000BASE-LX/LH, 1000BASE-ZX, etc. on a port-by-port basis.
Today we will mainly introduce three modes of Cisco SFP: GLC-LH-SM, GLC-SX-MM, GLC-ZX-SM. They are all with duplex LC interface and supporting data-rate of 1.25Gbps.

GLC ZX SM
Cisco GLC ZX SM SFP is used for 1000Base-ZX application, it works with single mode optical fiber at 1550nm working wavelength. Cisco GLC ZX SM could reach a max 120 km working distance over single mode fiber. This mini GBIC is carrier-class quality and can be fully trusted for your most demanding LAN/WAN applications, voice projects, or network deployments. Ingellen provide two kind of GLC ZX SM with 120 Km and 70Km transmission distance, Cisco 1000Base-ZX 120KM SFP and Cisco 1000Base-ZX 70KM SFP.
Specifications：
Product Number: GLC-ZX-SM
Product Name: Cisco 1000Base-ZX 120KM SFP, Cisco 1000Base-ZX 70KM SFP
Form Factor: Plug-in module
Device Type: Transceiver module
Product Type: SFP
Data Rate: 1.25Gbps
Wavelength: 1550nm
Datarange: 120km, 70km
Connector Type: LC Duplex
Cable Type: Single-Mode Fiber (SMF)
Standard Operation Temperature: 0~70 °C
Compatiblity: 100% Cisco Compatible
Applications:
Gigabit Ethernet
Fiber Channel
Switch to Switch interface
Switched backplane applications
Router/Server interface
Other optical transmission systems

GLC-LH-SM
GLC LH SM is a SFP fiber optic transceiver working at 1310nm wavelength, it could use with both multimode optical fiber and single mode optical fiber, it is small size transceiver with LC interface and it is hot swappable, easy to use, no need further configuration. GLC LH SM is used in Gigabit network and its max working distance is 40km over SMF at 1.25Gbps transfer rate.
Ingellen provide two kind of GLC-LH-SM with 10 Km and 40Km transmission distance, Cisco 1000Base-LX/LH 10 KM SFP and Cisco 1000Base-LX/LH 40KM SFP.
Specification:
Product Number: GLC-LH-SM
Product Name: Cisco 1000Base-LX/LH 40KM SFP, 1000Base-LX/LH 10 KM SFP
Form Factor: Plug-in module
Device Type: Transceiver module
Product Type: SFP
Data Rate: 1.25Gbps
Wavelength: 1310nm
Datarange: 40km, 10km
Connector Type: LC Duplex
Cable Type: Single-Mode Fiber (SMF)
Standard Operation Temperature: 0~70 °C
Compatiblity: 100% Cisco Compatible
Applications:
Gigabit Ethernet
Fiber Channel
Switch to Switch interface
Switched backplane applications
Router/Server interface
Other optical transmission systems

GLC-SX-MM
Cisco GLC SX MM is a commonly used SFP transceiver which is 1000Base-SX SFP for multimode fiber and works at 850nm wavelength. It can reach 550 meter working distance via 50/125 multimode fiber, and 220 meters on 62.5/125 multimode fibers. GLC SX MM SFP is hot swappable module that fits for Gigabit Ethernet port or slot and link the port with the network. Ingellen supply Cisco equivalent GLC SX MM SFP fiber optic transceiver at very competitive prices and fast delivery.
Specifications:
Product Number: GLC-SX-MM
Product Name: Cisco 1000Base-SX SFP
Form Factor: Plug-in module
Device Type: Transceiver module
Product Type: SFP
Data Rate: 1.25Gbps
Wavelength: 850nm
Datarange: 550m
Connector Type: LC Duplex
Cable Type: Multi-Mode Fiber (MMF)
Standard Operation Temperature: 0~70 °C
Compatiblity: 100% Cisco Compatible
Applications:
Gigabit Ethernet
Fiber Channel
Switch to Switch interface
Switched backplane applications
Router/Server interface
Other optical transmission systems

All the above mentioned Cisco SFP transceivers GLC-LH-SM, GLC-SX-MM, GLC-ZX-SM are 100% compatible with the original corresponding Cisco SFPs. Ingellen have many other Cisco SFP transceivers for your like GLC-T, SFP GE-S, SFP GE-L, CWDM-SFP-1470-1610 and more. We can ship the modules to you within 24 hours from the moment you place the orders. All of our Cisco compatible transceivers are tested in-house prior to shipping to insure they are in perfect physical and working condition. We guarantee the GLC-LH-SM, GLC-SX-MM, GLC-ZX-SM and the other Cisco SFP transceivers to work in your Cisco equipments and all of our transceiver modules come with a lifetime warranty.