SFP (Small Form-Factor Pluggable Plus) fiber transceiver modules make the fiber optic network or fiber-Ethernet network easier to upgrade or maintain, users can replace a single SFP module during the process instead of replace the whole board with many modules on it. SFP transceiver are different types working with different wavelength for various kinds of distances. SX SFP use 850nm for max 550 meters, LX SFP use 1310nm for max 10km, ZX SFP could reach 80km. There is also copper SFP that use a RJ45 interface. DOM function for SFP is optional, it help users detect real time SFP working status SFP transceiver is an innovative, next-generation transceiver module.
Cisco SFP Modules is also hot plugable, it is an upgraded version fiber optic transceiver, it represents the trend to be smaller and more flexibility. Cisco Compatible SFP includes a wide range of the transceivers with different working wavelength and distance. In the following list I will introduce you some information about GLC SX MM Transceiver and GLC LH SM Transceiver.
GLC SX MM Transceiver
Cisco GLC-SX-MM is 1000Base-SX SFP fiber optic transceiver for multimode fiber and it works at 850nm wavelength. GLC SX MM SFP is hot swappable module that fit for Gigabit Ethernet port or slot and link the port with the network, whose interface is dual LC for optical. GLC SX MM is about 1.3 cm x 5.7 cm x 0.9 cm in dimension, and 75g in weight. The GLC SX MM transceivers are compatible with SFP Multi-Source Agreement (MSA), 1000Base SX standard for Gigabit Ethernet and SFF-8472.
The GLC SX MM transceiver consists of three sections: a VCSEL laser transmitter, a PIN photodiode integrated with a trans-impedance preamplifier (TIA) and MCU control unit. All modules satisfy class I laser safety requirements. The GLC SX MM SFP transceivers are high performance, cost effective modules supporting data-rate of 1.25Gbps and 550m transmission distance with MMF.
GLC LH SM Transceiver
Cisco GLC-lH-SM SFP fiber optic transceiver working at 1300nm wavelength, GLC LH SM is suit for 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 10km over SMF or 550meters over MMF, data transfer rate at 1Gbps and it works based on IEEE 802.3z standards.
The GLC LH SM transceiver consists of three sections: a FP laser transmitter, a PIN photodiode integrated with a trans-impedance preamplifier (TIA) and MCU control unit. All modules satisfy class I laser safety requirements.
SFP fiber optic transceivers are upgraded version of its former GBIC transceivers, Cisco SFP transceiver adopt LC interface and its size is only about half of GBIC, thus Cisco SFP fiber transceivers fit for dense installations.