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Hack GPON 🏳️‍🌈

Hardware Specifications

   
Vendor/Brand FiberMall
Model GPON-ONU-STB+ (SC/UPC) / GPON-ONU-STAB+ (SC/APC)
Chipset Unknown
Flash  
RAM  
System  
HSGMII  
Optics SC/UPC or SC/APC
IP address  
Web Gui  
SSH  
Telnet  
Serial  
Form Factor miniONT SFP

Product Variants

Part Number Connector Temperature Price
GPON-ONU-STB+ SC/UPC 0 to 70°C $45.00
GPON-ONU-ISTB+ SC/UPC -40 to 85°C  
GPON-ONU-STAB+ SC/APC 0 to 70°C $45.00
GPON-ONU-ISTAB+ SC/APC -40 to 85°C  

All variants: SFP, TX-1.244G/RX-2.488G, T1310nm/R1490nm, GPON Class B+, MAC inside, RoHS 6, DDM.

Datasheet Specifications

General

   
TX Data Rate 1.244 Gbps (burst mode)
RX Data Rate 2.488 Gbps (continuous mode)
Max Distance 20 km
Fiber Type Single Mode 9/125 µm
Class B+
Power Supply 3.3V ± 5% (3.13–3.47V)
Power Dissipation 2.48 W typical
Operating Temperature 0 to 70°C (C-Temp) / -40 to 85°C (I-Temp)
DDM ✅ SFF-8472 v9.5

Transmitter Optical Characteristics

Parameter Min Typical Max Unit
Centre Wavelength 1290   1330 nm
Side Mode Suppression Ratio 30     dB
Optical Spectrum Width (RMS)     1 nm
Average Launch Power +0.5   +5.0 dBm
Power-OFF TX Optical Power     -45 dBm
Extinction Ratio 9     dB
Rise/Fall Time (20%-80%)     260 ps
Burst Turn-On Time     12.8 ns
Burst Turn-Off Time     12.8 ns
RIN15 OMA     -115 dB/Hz
Optical Return Loss Tolerance 15     dB
TX Reflectance     -6 dB
TX and Dispersion Penalty     2 dB

Receiver Optical Characteristics

Parameter Min Typical Max Unit
Operating Wavelength 1480 1490 1500 nm
Sensitivity (BER 10⁻¹²)     -28 dBm
Saturation Optical Power -8     dBm
LOS Deassert Level     -29 dBm
LOS Assert Level -40     dBm
LOS Hysteresis 0.5   5 dB
Receiver Reflectance     -20 dB
WDM Filter Isolation (1550 nm) 38     dB
WDM Filter Isolation (1650 nm) 35     dB

Electrical Characteristics

Parameter Min Typical Max Unit
Data Input Differential Swing 300   1600 mV
Data Output Differential Swing 300   1200 mV
Input Differential Impedance 90 100 110 Ω
TX Disable Voltage (Enable) 0   0.8 V
TX Disable Voltage (Disable) 2.0   VCC V

Transmitter: 1310 nm DFB laser. Receiver: 1490 nm APD-TIA, CML output (AC coupled).

Pin Definition

Pin Name Description
1 VeeT Transmitter Ground
2 TX Fault Transmitter Fault Indication (LVTTL output: low = normal, high = fault)
3 TX Disable Transmitter Disable; turns off transmitter laser output
4 MOD-DEF(2) SDA I²C Data line
5 MOD-DEF(1) SCL I²C Clock line
6 MOD-DEF(0) Module Absent, connected to VeeR
7 RateSelect Dying Gasp detect (input, active low)
8 LOS Loss of Signal
9 VeeR Receiver Ground
10 VeeR Receiver Ground
11 VeeR Receiver Ground
12 RD- Inverted Received Data Output
13 RD+ Received Data Output
14 VeeR Receiver Ground
15 VccR Receiver Power
16 VccT Transmitter Power
17 VeeT Transmitter Ground
18 TD+ Transmit Data In
19 TD- Inverted Transmit Data In
20 VeeT Transmitter Ground

Standards Compliance

  • ITU-T G.984.2 / G.984.2 Amendment 1 (GPON)
  • ITU-T G.988 (OMCI)
  • SFP MSA (SFF-8074i)
  • SFF-8472 v9.5 (DDM)
  • FCC 47 CFR Part 15, Class B
  • FDA 21 CFR 1040.10 and 1040.11
  • IEC-60825 (Class 1 laser safety)

Notes

  • The GPON-ONU-STB+ is described as a dual-mode ONU stick: it supports both GPON and EPON ONU OAM and will automatically establish a link with either a GPON OLT or EPON OLT.
  • Pin 7 (RateSelect) is repurposed for Dying Gasp detection (input, active low).
  • Data input is LVPECL compatible, DC coupled internally.
  • Receiver is APD-TIA based, providing higher sensitivity than the non-MAC CLB+ variant which uses Super-TIA.
  • This is a complete “PON on a Stick” — an entire FTTH ONU in a slightly oversized SFP that can be plugged into networking equipment (switch, router, PBX, etc.).

Miscellaneous Links