The Compact SFP (CSFP) transceivers consist of two bidirectional channels inside a conventional SFP form factor and they will he transceivers are compatible with the Compact Small Form- Factor Pluggable (CSFP) Multi-Source Agreement (MSA).

The compact small form-factor pluggable (CSFP) is a version of SFP with the same mechanical form factor allowing two independent bidirectional channels per port. It is used primarily to increase port density and decrease fiber usage per port. It enable network system vendors to double port density and data throughput, while reducing network equipment cost. The CSFP transceiver consists of 2-channel Bi-directional transceiver unit with five sections: the LD driver, the limiting amplifier, the digital diagnostic monitor, the FP or DFB laser and the PIN photo-detector. CSFP has the same size of SFP, Cisco also called this as 2- channel bi-directional SFP. This 1000BASE-BX CSFP transceivers data link to 20km or 40km for customer's choice.

Features 
● 2-channel Bi-directional optical transceiver
● 1.25Gbps Typical Data Rate and compliant to 1000Base-BX IEEE802.3ah
● FP/DFB laser transmitter and PIN photo-detector
● Hot-pluggable CSFP footprint
● Up to 20km or 40km on 9/125µm SMF
● LC/UPC type pluggable optical interface
● Achieve operational compatibility with conventional SFP
● Metal enclosure, for lower EMI
● Single +3.3V power supply
● Support Digital Diagnostic Monitoring interface
● Compact SFP MSA compliant
● RoHS compliant and lead-free
● Operating temperature: Standard: 0°C to +70°C