1.25G BiDi SFP Fiber Optical Transceiver 40km 1000BASE-BX 1490nm-TX/1310nm-RX SMF

Basic Information
Place of Origin: Shenzhen, China
Brand Name: GIGAOPTO
Certification: CE, FCC, ROHS, ISO9001, ISO14000, MSDS, REACH, CP65, TUV, UL
Model Number: GTS-B4312-40DC
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 Type: 1000BASE-BX BIDI SFP Speed: 1000Mbps
Max Distance: 40km (24.9 Miles) Average Output Power: -5~0dBm
Power Budget: 18dB Centre Wavelength: 1490nm-TX/1310nm-RX
Digital Optical Monitoring: Supported Keywords: 1.25G BiDi SFP 40km Fiber Module, 1000BASE-BX T1490nm R1310nm, SFP BiDi SMF
High Light:

Fiber Optical Transceiver 40km


SFP Fiber Optical Transceiver


1.25G BiDi SFP Transceiver

Product Description

Cisco Compatible 1.25G BiDi SFP Transceiver Module 1000BASE-BX 40km 1490nm-TX/1310nm-RX SMF DOM Simplex LC





The GIGAOPTO's GTS-B4312-40DC SFP transceiver provides 1000Base-BX throughput up to 40km over single-mode fiber (SMF) using a wavelength of 1490nmTx/1310nmRx via an LC simplex connector. This 1.25G BiDi SFP Transceiver is a high performance and cost-effective small form factor pluggable Bi-directional transceiver for Gigabit Ethernet and 1G Fiber Channel application. This bi-directional unit must be used with another transceiver or network equipment of complementary wavelengths. It provides 1000BASE Ethernet connectivity options for Fast Ethernet, Telecom and Data Centers.


This SFP module can be coded to be compatible with many brands’ networking equipment, including Ethernet Switches, Ethernet Routers, Network Interface Cards (NICs) and Media Converters. All modules satisfy class I laser safety requirements, and are compatible with SFP Multi-Source Agreement (MSA)and SFF-8472 specifications.



  • Support Up to 1.25Gb/s data links
  • Supports Digital Optical Monitoring (DOM) capability
  • Compliant with SFP MSA Specification
  • Single +3.3V power supply
  • 40km with 9/125 μm SMF
  • Hot-pluggable SFP footprint simplex LC connector interface
  • Metal with lower EMI
  • Two types:
  • A:1310nm DFB transmitter /1490nm receiver
  • B:1490nm DFB transmitter/1310nm receiver
  • Excellent ESD protection
  • International Class1 laser safety certified
  • Operating temperature range:

Commercial: 0°C ~ 70°C

Extended: -20°C~ 85°C

Industrial: -40°C~85°C

  • RoHS Compliant
  • INF-8074 and SFF-8472 Compliance


  • 1.063Gbps Fiber Channel
  • 1.25Gbps optical systems
  • Gigabit Ethernet
  • Other optical links



Compatible Brand CISCO Compatible PN GLC-BX40-DA
Product Type Small Form Factor Pluggable Bit Rate 1.25Gbps
Connector Type Simplex LC Operating Distance 40km (24.9 miles)
Digital Optical Monitoring YES Cable Type SMF
Power Budget 18dB Ambient Temperature



0 to 70°C (32 to 158°F)

-40 to 85°C (-40 to 185°F)

Centre Wavelength 1490nm-TX/1310nm-RX Power Supply Voltage 3.30V
Power Consumption <1W Power Supply Current <300mA
Optical Components DFB BiDi PD Type PIN
Transmit Power Range -5~0dBm RX Sensitivity < -23dBm
Extinction Ratio >9dB Overload >-3dBm
Applications Fiber Channel Links; WDM Gigabit Ethernet Links; FTTX Application
Protocols IEEE 802.3z, Fast Ethernet, Gigabit Fibre Channel, MSA Compliant


Notice: When the long reach transceiver is used in short distance transmission, please matched with appropriate attenuator

according to the table.

Distance ≤10km ≤20km
Attenuator 10dB 5dB




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-BX-D BiDi SFP TX1490nm/RX1310nm 40km) 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
Juniper SFP-GE40KT14R13 Extreme MGBIC-BX40-D
Brocade E1MG-1G-BXDA-40 HuaWei LE2MGSC40ED0
Avaya AA1419077-E6 Alcatel-Lucent SFP-GIG-BX-D40



Ordering Information


P/N Description Speed Wavelength Distance Transmitter TX Power
GTS-B3412-40DC 1000BASE-BX BiDi SFP 1250M 1310nm-TX/1490nm-RX 40km DFB -5~0dBm
GTS-B4312-40DC 1000BASE-BX BiDi SFP 1250M 1490nm-TX/1310nm-RX 40km DFB -5~0dBm
GTS-B3512-40DC 1000BASE-BX BiDi SFP 1250M 1310nm-TX/1550nm-RX 40km DFB -5~0dBm
GTS-B5312-40DC 1000BASE-BX 1.25G BiDi SFP 1250M 1550nm-TX/1310nm-RX 40km DFB -5~0dBm

Contact Details

WhatsApp : +8615989585901