1000BASE-CWDM SFP Optical Transceiver 1.25Gbps SMF 1270nm-1610nm 20km

Basic Information
Place of Origin: Shenzhen, China
Brand Name: GIGAOPTO
Certification: CE, FCC, ROHS, ISO9001, ISO14000, MSDS, REACH, CP65, TUV, UL
Model Number: GTS-C2712-20DC
Minimum Order Quantity: 1 pcs
Price: Negotiable
Packaging Details: Single Package, 10 or 20pcs per Tray, 30 or 50 or 100pcs per box, 400 or 600pcs per carton
Delivery Time: 1-5 working days
Payment Terms: T/T, Western Union
Supply Ability: 100,000pcs /month
Detail Information
Form Factor: 1000BASE-CWDM Bit Rate: 1.25Gb/s
Laser Type: DFB CWDM Power Budget: 19dB
Wavelength: 1260~1610nm Channel Max Distance: 20km (12.4 Miles)
Max Power Consumption: 1W
High Light:

SMF SFP Optical Transceiver


SFP Optical Transceiver 1.25Gbps



Product Description

1000BASE-CWDM 1.25Gbps SFP Transceiver Module SMF 1270~1610nm 20km Duplex LC DOM





The GIGAOPTO's GTS-C2712-20DC series transceivers are high performance and cost-effective CWDM (Coarse Wavelength-Division Multiplexing) SFP modules for 1000BASE Gigabit Ethernet and 1G Fiber Channel application, providing a high capacity, high bandwidth communication solutions for multiplexed optical networks. The SFP module supports 1Gb/s throughput up to 20km link lengths over single-mode fiber (SMF) via an LC duplex connector.


This module series is designed to operate at a nominal wavelength of CWDM wavelength.There are 18 center wavelengths available from 1270nm to 1610nm with each step 20nm. Digital optical monitoring (DOM) support is also present to allow access to real-time operating parameters.


It is built to be SFP MSA compliant and is uniquely serialized and data-traffic and application tested to ensure that they will integrate into your network seamlessly.


  • Data-rate of 1.25Gbps operation
  • Single 3.3V power supply
  • Built-in digital diagnostic via 2-wire interface
  • Low power dissipation <1W typically
  • Metal enclosure provides lower EMI
  • Up to 120km on 9/125µm SMF
  • Hot-pluggable SFP footprint Duplex LC
  • 18-Wavelength CWDM 1270n~1610nm Available
  • CWDM DFB laser transmitter
  • Case operating temperature range:

Commercial: 0°C~70°C (32 to 158°F)

Industrial: -40°C~85°C (-40 to 185°F)

  • Compliant with RoHS and lead-free
  • Compliant with RoHS, REACH, CE, FCC standards



  • WDM systems
  • Switched backplane applications
  • Router/Server interface
  • 1G Fiber Channel, Switch to Switch Interface
  • Gigabit Ethernet
  • Other optical networking




Product Packaging SFP Data Link 1000Mbps
Interface LC Duplex connector Link Length 20km (12.4 miles)
DDM/DOM Yes Fiber Type Single Mode Fiber
Warranty 3 Years Temperature Range Commercial 0 to 70°C
Centre Wavelength 1270~1610nm Power Supply Voltage 3.3V
Power Consumption 1W Supply Current 300mA
Total System Budget >19dB Storage Temperature -40 to 85°C
Optical Components DFB CWDM Receiver Type PIN
Transmitter Power -6~0dBm Sensitivity <-24dBm
ER >9dB RX Overload >-3dB
Protocols IEEE802.3z, MSA Compliant



Ordering Information


Part Number Description - 1.25G SFP CWDM CWDM/ CH Reach (km) Connector Latch Color
GTS-C2712-20DC 1.25Gb/s SFP CWDM 1270nm SMF 1270nm / -C27 20km LC Duplex Light Purple
GTS-C2912-20DC 1.25Gb/s SFP CWDM 1290nm SMF 1290nm/ -C29 20km LC Duplex Sky Blue
GTS-C3112-20DC 1.25Gb/s SFP CWDM 1310nm SMF 1310nm/ -C31 20km LC Duplex Yellow Green
GTS-C3312-20DC 1.25Gb/s SFP CWDM 1330nm SMF 1330nm/ -C33 20km LC Duplex Yellow Ocher
GTS-C3512-20DC 1.25Gb/s SFP CWDM 1350nm SMF 1350nm/ -C35 20km LC Duplex Pink
GTS-C3712-20DC 1.25Gb/s SFP CWDM 1370nm SMF 1370nm/ -C37 20km LC Duplex Beige
GTS-C3912-20DC 1.25Gb/s SFP CWDM 1390nm SMF 1390nm/ -C39 20km LC Duplex White
GTS-C4112-20DC 1.25Gb/s SFP CWDM 1410nm SMF 1410nm/ -C41 20km LC Duplex Silver
GTS-C4312-20DC 1.25Gb/s SFP CWDM 1430nm SMF 1430nm/ -C43 20km LC Duplex Black
GTS-C4512-20DC 1.25Gb/s SFP CWDM 1450nm SMF 1450nm/ -C45 20km LC Duplex Yellow Orange
GTS-C4712-20DC 1.25Gb/s SFP CWDM 1470nm SMF 1470nm / -C47 20km LC Duplex Gray
GTS-C4912-20DC 1.25Gb/s SFP CWDM 1490nm SMF 1490nm/ -C49 20km LC Duplex Violet
GTS-C5112-20DC 1.25Gb/s SFP CWDM 1510nm SMF 1510nm/ -C51 20km LC Duplex Blue
GTS-C5312-20DC 1.25Gb/s SFP CWDM 1530nm SMF 1530nm/ -C53 20km LC Duplex Green
GTS-C5512-20DC 1.25Gb/s SFP CWDM 1550nm SMF 1550nm/ -C55 20km LC Duplex Yellow
GTS-C5712-20DC 1.25Gb/s SFP CWDM 1570nm SMF 1570nm/ -C57 20km LC Duplex Orange
GTS-C5912-20DC 1.25Gb/s SFP CWDM 1590nm SMF 1590nm/ -C59 20km LC Duplex Red
GTS-C6112-20DC 1.25Gb/s SFP CWDM 1610nm SMF 1610nm/ -C61 20km LC Duplex Brown


Each Gigaopto’s optical transceiver is tested in the host device to verify interoperability, and we promise 100% full compatibility on the specified device with a 3-year warranty.
For this (1.25G SFP CWDM 20km), please refer to the P/N correspondence table (e.g.1270nm wavelength channel). If you are interested in knowing more compatibility, you are always welcome to contact us.


Corresponding Compatible Brand/Part Number
Brand P/N Brand P/N
Arista SFP-1G-CW-1270-20 Juniper EX-SFP-GE20KCW1270
Brocade E1MG-CWDM20-1270 Dell CWDM-SFP-1270-20
Extreme CWDM-SFP-1270-20 HPE SFP20K-CW1270
HuaWei 0231A2-1270 H3C SFP-GE-LH20-SM1270-CW

Pin Definition


1000BASE-CWDM SFP Optical Transceiver 1.25Gbps SMF 1270nm-1610nm 20km 0



Typical Application Circuit


1000BASE-CWDM SFP Optical Transceiver 1.25Gbps SMF 1270nm-1610nm 20km 1



Package Outline

Dimensions are in millimeters. All dimensions are ±0.1mm unless otherwise specified. (Unit: mm)


1000BASE-CWDM SFP Optical Transceiver 1.25Gbps SMF 1270nm-1610nm 20km 2

Contact Details

WhatsApp : +8615989585901