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Hack GPON 🏳️‍🌈

Hardware Specifications

   
Vendor/Brand FiberMall
Model GPON-ONU-CLB+
Chipset  
Optics SC/UPC
Form Factor SFP
PON MAC ❌ None (raw transceiver, requires external PON MAC)

Product Variants

Part Number TX Enable Temperature Price
GPON-ONU-CLB+ Low level -5 to 70°C $15.00
GPON-ONU-ILB+ Low level -40 to 85°C  
GPON-ONU-CHB+ High level -5 to 70°C  
GPON-ONU-IHB+ High level -40 to 85°C  

All variants: SFP, TX-1.244G/RX-2.488G, T1310nm/R1490nm, GPON Class B+, no MAC, 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% (3.135–3.465V)
Supply Current 300 mA max
Power Consumption 1 W
Operating Temperature -5 to 70°C (C-Temp) / -40 to 85°C (I-Temp)
DDM ✅ SFF-8472

Transmitter Optical Characteristics

Parameter Min Typical Max Unit
Launched Power (avg.) +0.5   +5.0 dBm
Operating Wavelength Range 1260   1360 nm
Output Spectrum Width (RMS)     1.0 nm
Side Mode Suppression Ratio 30     dB
Extinction Ratio 9     dB
Optical Rise Time     260 ps
Optical Fall Time     260 ps
Output Power After TX Disable     -50 dBm
Burst Turn-On Time     12.8 ns
Burst Turn-Off Time     12.8 ns
TX Reflectance     -15 dB

Receiver Optical Characteristics

Parameter Min Typical Max Unit
Wavelength Range 1480   1500 nm
Sensitivity (BER ≤ 10⁻¹²)     -28 dBm
Saturation Optical Power -8     dBm
SD Assert Level     -29 dBm
SD Deassert Level -45     dBm
SD Hysteresis 0.5   6 dB
Receiver Reflectance     -12 dB

Electrical Characteristics

Parameter Min Typical Max Unit
TX Differential Input Voltage 300   2400 mV
RX Differential Output Voltage 500   1200 mV
TX Common-Mode Input Voltage 1.6   2.4 V
Input Differential Impedance 90 100 110 Ω
TX Fault Output (Normal) 0   0.4 V
TX Fault Output (Fault) 2.4   VCC+0.3 V
SD Assert Time     100 µs
SD Deassert Time     100 µs

Transmitter: 1310 nm DFB laser, LVPECL input (DC coupled). Receiver: 1490 nm Super-TIA, CML output (AC coupled).

DDM Accuracy

Parameter Accuracy
Temperature ±3°C
Voltage ±3%
Bias Current ±10 mA
TX Power ±3 dB
RX Power ±3 dB

Pin Definition

Pin Name Description
1 VeeT Transmitter Ground
2 TX_Fault Transmitter Fault Indication (LVTTL output: low = normal, high = abnormal)
3 TX_Burst Transmitter Burst Enable Input (LVTTL)
4 MOD-DEF(2) I²C Data (SDA), LVTTL
5 MOD-DEF(1) I²C Clock (SCL), LVTTL
6 MOD-DEF(0) Module Definition 0, grounded within module
7 TX_SD Transmitter Signal Detect (LVTTL output, active high)
8 RX_SD Receiver Signal Detect (LVTTL output: high = signal, low = loss)
9 VeeR Receiver Ground
10 VeeR Receiver Ground
11 VeeR Receiver Ground
12 RD- Inverted Receiver Data Out (CML, AC coupled)
13 RD+ Receiver Data Out (CML, AC coupled)
14 VeeR Receiver Ground
15 VccR Receiver Power
16 VccT Transmitter Power
17 VeeT Transmitter Ground
18 TD+ Transmit Data In (LVPECL, DC coupled)
19 TD- Inverted Transmit Data In (LVPECL, DC coupled)
20 VeeT Transmitter Ground

EEPROM (A0h) Key Fields

Address Field Value Description
00 Identifier 03 SFP
01 Ext. Identifier 04 Module soldered to motherboard
02 Connector 01 Optical Pigtail
11 Encoding 03 NRZ
12 BR, Nominal 0C 1.2 Gbps
14 Length (9µm km) 14 20 km
40–55 Vendor P/N GPON-ONU-xxB+ ASCII
60–61 Laser Wavelength 051E 1310 nm
92 Diag. Mon. Type 68 Internal calibration, avg. power RX

Standards Compliance

  • ITU-T G.984.2 (GPON)
  • SFP MSA (SFF-8074i)
  • SFF-8472 (DDM)
  • FCC 47 CFR Part 15, Class B
  • FDA 21 CFR 1040.10 and 1040.11 (Laser Notice No. 50)
  • IEC-60825 (Class 1 laser safety)
  • Telcordia GR-468-CORE
  • TR-NWT-000870 ESD Class 2

Key Differences vs STB+ (with MAC)

Feature CLB+ (no MAC) STB+ (with MAC)
PON MAC ❌ None ✅ Integrated
Receiver Type Super-TIA APD-TIA
Power Consumption 1 W 2.48 W
GPON/EPON Dual-Mode ❌ GPON only ✅ Auto-detect GPON/EPON
OMCI (G.988) ❌ ✅
Pin 3 TX_Burst (burst enable) TX_Disable
Pin 7 TX_SD (TX signal detect) Dying Gasp detect
Pin 8 RX_SD (RX signal detect) LOS
Price $15.00 $45.00

Miscellaneous Links