1000BASE-LX/LH SFP Transceiver Module , SFP 1.25 G 1310nm 20km SMF DOM

Basic Information
Place of Origin: China
Brand Name: GIGAOPTO
Certification: CE, FCC, ROHS, ISO9001, ISO14000, MSDS, REACH, CP65, TUV, UL
Model Number: GTS-L1312-20DC
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
Product Name: 1000BASE SFP Package: SFP
Data Rate: 1.25Gb/s Center Wavelength: 1310nm
Cable Type: SMF Warranty: 3 Years
DOM: Supported Keywords: 1G 1310nm 20km Module, SMF 1.25G Optical Transceiver, 1000BASE-LX/LH DOM
Optical Components: FP Reach: 20km
High Light:

1000BASE-LX/LH SFP Transceiver Module


SFP 1.25 G 1310nm 20km


1.25g SFP Transceiver

Product Description

Cisco Compatible 1000BASE-LX/LH 1.25G 1310nm 20km SMF DOM Duplex LC SFP Optical Module




Compatible Brand CISCO Compatible PN GLC-LH-SM-20
Form Type SFP Data Rate (Gbps) 1.25Gbps
Optical Connector Duplex LC Max Supported Link Length 20km
DOM YES Fibre Type Single Mode Fiber
Warranty 3 years Operating Temperature


0 to 70°C (32 to 158°F)

Wavelength 1310nm Power Supply Voltage 3.3V
Power Consumption 1W Total Current <300mA
Laser Type FP 1310nm Receiver Type PIN
Average Output Power -9.5 to -3dBm Receiver Sensitivity < -20dBm
Extinction Ratio >9dB Receiver Overload >-3dBm
Protocols SFF-8472 MSA Compliant, IEEE 802.3ah-2004, IEEE 802.3z




The GIGAOPTO's GTS-L1312-20DC is a high performance, cost-effective transceiver supporting data-rate of 1.25Gbps and 20km transmission distance with SMF. It is a small form factor pluggable module, a hot-swappable input/output device for bi-directional serial optical data communications such as Gigabit Ethernet 1000BASE-LX and Fiber Channel 1x SM-LC-L FC-PI. The SFP module can be used and interchanged on a wide variety of switches and routers. This SFP series is designed to be compliant with SFF-8472 SFP Multi-source Agreement (MSA).



  • Up to 1.25Gb/s bi-directional data links
  • Transmitter disable input

  • 1310nm FP laser and PIN photo detector
  • 20km with 9/125 µm SMF
  • Single +3.3V power supply
  • DDMI function available with internally calibrated mode

  • Receiver loss of signal output

  • Duplex LC receptacle optical interface compliant
  • Metal enclosure, for lower EMI
  • International Class1 laser safety certified
  • Operating temperature range:

Commercial: 0°C~70°C

Industrial: -40°C~85°C

  • RoHS6 Compliant



  • Gigabit Ethernet Switches and Routers
  • 1.25Gbps Optical systems
  • 1.063Gbps Fiber Channel
  • Ethernet/SDH/OTN SONET





Gigaopto's optical transceivers are 100% compatible with many famous switch brands and will not cause damage to OEM devices. In order to ensure the quality and compatibility of our products, each product is carefully tested on the corresponding equipment before delivery to customers.
For this (1000BASE-LX/LH SFP 1310nm 20km) compatibility, please refer to the P/N correspondence table. If the brand and part number you are looking for is not listed below, please let us know and we will be delighted to provide you with more details.   


Compatible Brand Compatible Part Number Compatible Brand Compatible Part Number
CISCO GLC-LH-SM-20 Alcatel-Lucent 1AB187280029
Juniper SFP-1GE-LX-20 Brocade E1MG-LX-20
Arista SFP-1G-LX-20    



Ordering Information


Part Number Package Data Rate Wavelength Reach Fiber Type Interface
GTS-L0812-02DC 1000BASE-SX SFP 1250M 850nm




Multi Mode LC
GTS-L1312-M2DC 1000BASE-SX SFP 1250M 1310nm 2km Multi Mode LC
GTS-L1312-10DC 1000BASE-LX SFP 1250M 1310nm 10km Single Mode LC
GTS-L1312-20DC 100BASE-LH SFP 1250M 1310nm 20km Single Mode LC
GTS-L1512-40DC 1000BASE-EX SFP 1250M 1550nm 40km Single Mode LC
GTS-L1312-40DC 1000BASE-EX SFP 1250M 1310nm 40km Single Mode LC
GTS-L1512-80DC 1000BASE-ZX SFP 1250M 1550nm 80km Single Mode LC
GTS-L1512-A0DC 1000BASE-EZX SFP 1250M 1550nm 100km Single Mode LC
GTS-L1512-C0DC 1000BASE-EZX SFP 1250M 1550nm 120km Single Mode LC
GTS-L1512-F0DC 1000BASE-EZX SFP 1250M 1550nm 160km Single Mode LC



Pin Definition


1000BASE-LX/LH SFP Transceiver Module , SFP 1.25 G 1310nm 20km SMF DOM 0



Typical Application Circuit


1000BASE-LX/LH SFP Transceiver Module , SFP 1.25 G 1310nm 20km SMF DOM 1



Package Outline

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


1000BASE-LX/LH SFP Transceiver Module , SFP 1.25 G 1310nm 20km SMF DOM 2

Contact Details

WhatsApp : +8615989585901