TX-2.5G/RX-1.25G GPON SFP Transceiver Class B+ 20km DDM Transceiver

Basic Information
Place of Origin: China
Brand Name: Gigaopto
Certification: CE, FCC, ROHS, ISO9001, ISO14000, MSDS, REACH, CP65, TUV, UL
Model Number: GTS-SGT21-20DCB
Minimum Order Quantity: 1
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: 1-5days
Payment Terms: T/T, L/C
Supply Ability: 50,000pcs/month
Detail Information
Product Name: GPON OLT SFP Transceiver Type: Class B+
Wavelength: TX-1490nm/RX-1310nm Interface: Simplex SC
DDM: Support Data Rate: TX-2.488/RX-1.244
Distance: 20km Keywords: Class B+ GPON OLT SFP Module
High Light:

RX-1.25G GPON SFP Transceiver


GPON SFP Transceiver Class B+


SFP DDM Transceiver

Product Description

TX-2.5G/RX-1.25G GPON Transceiver Class B+ (SMF, 1490nm-TX/1310nm-RX, 20km, SC )





The GIGAOPTO's GTS-SGT21-20DCB is a high performance transceiver module for single fiber communications using a 1490nm continuous-mode transmitter and a 1310nm burst-mode receiver. It is designed to meet ITU G.984.2 Class B+ requirements for optical line terminal (OLT) applications.

The 1490nm DFB LD transmitter has automatic power control (APC) function and temperature compensation circuitry to ensure stable optical power and extinction ratio over all operating temperature range. The transmitter meets Class 1 eye safety per IEC60825 and CDRH standards.The receiver has a hermetically packaged APD-TIA (trans-impedance amplifier) pre-amplifier and a limiting amplifier with LVPECL compatible differential outputs. It features a Burst Packet Detect (SD) output which is LVTTL compatible. The SD output will come high after receiving the burst packet.

The module provides digital diagnostic information of its operating conditions and status, including transmitting power, laser bias current, module temperature, and supply voltage. Calibration and alarm/warning threshold data are written and stored in the internal memory (EEPROM).

SFP transceiver module has done sampling test under most famous brands of routers, switches, servers.

The hot swappable GPON SFP transceiver is ideal for Internet Service Provider (ISP) Gigabit Passive Optical Network (GPON) communication links, other optical links.





Form Factor GPON SFP Power Supply Voltage 3.3V
Connector/Polish SC/UPC Maxim Distance 20km
DDM Supported Media SMF
Warranty 3 Years Temperature Commercial /Industrial
TX Data Rate 2.488Gbps RX Data Rate 1.244Gbps
TX Wavelength 1490nm RX Wavelength 1310nm
Power Consumption <1.5W Total Current 450mA
Transmitter Type DFB Receiver Type APD
TX Optical Power +1.5~+5.0dBm RX Sensitivity < -28.0dBm
Extinction Ratio >8.2dB Receiver Overload >-8dBm
Protocols SFF-8472, ITUT-984.2





  • Single fiber bi-directional data links asymmetric TX 2488Mbps/RX1244Mbps application
  • 1490nm continuous-mode DFB laser transmitter and 1310nm burst-mode APD-TIA receiver
  • Small Form Factor Pluggable package with SC/UPC Connector
  • 0 to 70°C operating temperature
  • Single 3.3V power supply
  • Digital diagnostic monitoring interface
  • Digital burst RSSI function to monitor the input optical power level
  • LVPECL compatible data input/output interface
  • LVTTL transmitter disable control
  • LVTTL transmitter laser fault alarm
  • Fast LVTTL receiver Signal Detect (SD) indication response
  • Low EMI and excellent ESD protection
  • Class I laser safety standard IEC-60825 compliant
  • RoHS6 Compliance




  • Gigabit-capable Passive Optical Networks (GPON)




  • Complies with SFP Multi-Source Agreement (MSA) SFF-8074i
  • Complies with ITU-T G.984.2 Amendment 1
  • Complies with FCC 47 CFR Part 15, Class B
  • Complies with FDA 21 CFR 1040.10 and 1040.11 except for deviations pursuant to Laser Notice No. 50, dated June 24, 2007
  • Complies with SFF-8472
  • Compatible with TR-NWT-000870 4.1 ESD sensitivity classification Class2.
  • Compatible with Telcordia GR-468-CORE


Ordering information - Gigaopto’s GPON OLT SFP Series(DFB+APD SC Simplex)


P/N Date Rate (Gb/s) Wavelength (nm) Class Tx Power Rx Sensitivity Temperature
GTS-SGT21-20DCB TX-2.488/RX-1.244 TX-1490nm/RX-1310nm B+ +1.5~+5.0dBm < -28.0dBm Com
GTS-SGT21-20DIB TX-2.488/RX-1.244 TX-1490nm/RX-1310nm B+ +1.5~+5.0dBm < -28.0dBm Ind.
GTS-SGT21-20DCC TX-2.488/RX-1.244 TX-1490nm/RX-1310nm C+ +3.0~+7.0dBm < -30.0dBm Com
GTS-SGT21-20DIC TX-2.488/RX-1.244 TX-1490nm/RX-1310nm C+ +3.0~+7.0dBm < -30.0dBm Ind.
GTS-SGT21-20DCD TX-2.488/RX-1.244 TX-1490nm/RX-1310nm C++ +4.5~+10.0dBm < -31.0dBm Com
GTS-SGT21-20DID TX-2.488/RX-1.244 TX-1490nm/RX-1310nm C++ +4.5~+10.0dBm < -31.0dBm Ind.
GTS-SGT21-20DCE TX-2.488/RX-1.244 TX-1490nm/RX-1310nm C+++ / D +6.0~+10.0dBm < -32.0dBm Com
GTS-SGT21-20DIE TX-2.488/RX-1.244 TX-1490nm/RX-1310nm C+++ / D +6.0~+10.0dBm < -32.0dBm Ind.
Note OEM/ODM Supported, Please Feel Free To Contact Us!





All of GIGAOPTO's GTS-SGT21-20DCB SFP optical transceiver modules are open sourced, can be coded to be fully compatible with worldwide popular brands' devices, e.g. HUAWEI MA5603T, HUAWEI MA5608T, HUAWEI MA5680T, HUAWEI MA5800T, ZTE ZXA10 C300, ZTE ZXA10 C320, ZTE C600, Alcatel-Lucent 7360, Nokia 7360, C-DATA, VSOL, BDCOM. Please refer to the following table for detailed compatibility, please feel free to contact us.


Corresponding Compatible Brand/Part Number
Brand Part Number Brand Part Number
Gigaopto GTS-SGT21-20DCB Alcatel-Lucent 3FE53441AA 01
ZTE GPON-OLT-Class B+ Calix 100-01782
ZTE 33030100152 Dasan MXK-GPON-SFP-B+-RSSI
Ubiquiti UF-GP-B+ Cisco SFP-GPON-B
BDCOM OLT-GSFP-B+ Calix 100-01836
Broadex D24364-SSCB SuperXon SOGP4321-PSGB
WTD RTXM167-522    

Contact Details

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