Sopto 2.5G/1.25G GPON OLT SFP — 1490/1310 nm, SC, Class C++, DDM

The Sopto SPT-GT4321-SC2CD is a GPON OLT SFP optical transceiver operating at 2.5Gbps downstream and 1.25Gbps upstream over single-mode fiber. Using 1490 nm (Tx) / 1310 nm (Rx) wavelengths and an SC connector, it supports Class C++ 32 dB optical budget with digital diagnostics (DDM). Ideal for FTTx, ISP, and GPON OLT systems, it complies with ITU-T G.984.2 and SFP MSA standards.

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Description

The Sopto SPT-GT4321-SC2CD is a high-performance GPON OLT SFP transceiver engineered for Gigabit Passive Optical Network (GPON) applications. It delivers 2.5 Gbps downstream at 1490 nm and 1.25 Gbps upstream at 1310 nm over single-mode fiber (SMF), enabling reliable fiber access up to 20 km depending on system configuration.

Compliant with ITU-T G.984.2, SFP MSA, and RoHS standards, this module integrates digital diagnostics monitoring (DDM) per SFF-8472 for real-time monitoring of temperature, voltage, and optical power. The Class C++ optical budget (up to 32 dB) provides superior link stability and longer reach for dense FTTx deployments.

With its SC optical interface, hot-pluggable SFP form factor, and low power consumption, the SPT-GT4321-SC2CD ensures easy integration and maintenance in OLT devices. The commercial-temperature rating (0 °C ~ +70 °C) and EMI-shielded metal housing make it a durable, high-efficiency solution for GPON OLT systems, ISP access, and enterprise FTTx networks.


Application

FTTx networks, ISP access, GPON OLT systems, Enterprise fiber backbones


Key Features

  • ✅ GPON OLT SFP transceiver for FTTx networks

  • ✅ 2.5 Gbps downstream / 1.25 Gbps upstream rates

  • ✅ 1490 nm Tx / 1310 nm Rx dual-wavelength operation

  • ✅ SC optical connector, single-mode fiber

  • ✅ Class C++ optical budget (up to 32 dB)

  • ✅ Digital diagnostics monitoring (DDM)

  • ✅ Compliant with ITU-T G.984.2 and SFP MSA

  • ✅ Hot-pluggable design, low power consumption

Specifications

Specification Details
Brand Sopto
Model SPT-GT4321-SC2CD
Product Type GPON OLT SFP Optical Transceiver
Downstream Data Rate 2.5 Gbps
Upstream Data Rate 1.25 Gbps
Wavelength 1490 nm (Tx) / 1310 nm (Rx)
Optical Interface SC connector
Fiber Type Single-mode fiber (9/125 µm)
Transmission Distance Up to 20 km
Optical Budget Class C++ (≈ 32 dB)
Digital Diagnostics Yes (DDM, SFF-8472)
Standards Compliance ITU-T G.984.2, SFP MSA, RoHS
Power Supply 3.3 V DC
Power Consumption < 1.5 W typical
Hot-Pluggable Yes
Operating Temperature 0 °C ~ +70 °C (Commercial)
Storage Temperature –40 °C ~ +85 °C
Housing Metal casing with EMI shielding
Package Contents 1 × SPT-GT4321-SC2CD module
Warranty 9 months

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