GigaLight GPB-3424L-L2CD-HUI SFP Transceiver Module

The GigaLight GPB-3424L-L2CD-HUI is a hot-pluggable Bi-Directional (BiDi) SFP optical transceiver module designed for Gigabit Ethernet and 1G Fiber Channel applications over a single strand of single-mode fiber. It utilizes WDM technology with a 1310 nm Fabry-Perot (FP) laser transmitter and a 1490 nm PIN photodiode receiver. The module supports transmission distances of up to 20 km and is Huawei-compatible (-HUI coding), ensuring seamless integration with Huawei networking equipment while fully complying with the SFP Multi-Source Agreement (MSA) and SFF-8472 digital diagnostic standards.This transceiver supports dual data rates of 1.25 Gbps for Gigabit Ethernet and 1.063 Gbps for 1G Fiber Channel. It features a simplex LC optical interface, enabling bidirectional communication over one single-mode fiber (SMF, ITU-T G.652). The electrical interface consists of a 20-pin SFP connector with differential CML signals. The module operates from a single +3.3 V power supply with low power consumption, typically below 1 W.

Digital diagnostic monitoring (DDM) is implemented according to SFF-8472 via the two-wire I2C interface. This allows real-time monitoring and reporting of key parameters including transmitted optical power, received optical power, laser bias current, supply voltage, and module temperature. Programmable warning and alarm thresholds support proactive fault detection and performance optimization. Additional control functions include transmitter disable (TX_DISABLE) and loss-of-signal (LOS) indication.

Optical performance specifications include average transmitter output power typically from -9 dBm to -3 dBm and receiver sensitivity of -24 dBm or better, providing a sufficient link budget for 20 km reach with adequate system margin. The design meets IEEE 802.3z Gigabit Ethernet requirements and relevant Fiber Channel standards for jitter tolerance, extinction ratio, and eye mask compliance. The GPB-3424L-L2CD-HUI is classified as a Class 1 laser product and complies with RoHS and EMC directives.

The transceiver is compatible with a wide range of SFP-enabled switches, routers, and network interface cards, particularly optimized for Huawei platforms. It is ideal for Gigabit Ethernet links in enterprise networks, campus backbones, metropolitan area networks, FTTx deployments, and any application where single-fiber infrastructure is preferred to optimize cabling costs and fiber utilization.

Installation is straightforward thanks to the hot-pluggable SFP form factor, which permits insertion or removal without powering down the host equipment. The module is rated for commercial operating temperatures from 0°C to +70°C and requires minimal airflow for thermal management. Proper cleaning and inspection of the simplex LC connector are essential to prevent contamination and ensure long-term link reliability.

During operation, the GPB-3424L-L2CD-HUI performs automatic rate detection where supported by the host device and delivers calibrated digital diagnostic data for accurate performance reporting. Recommended connections use single-mode simplex LC patch cords. The module integrates easily with host management systems through standard SNMP or CLI interfaces for remote monitoring of optical parameters and link status.

This BiDi SFP transceiver offers a reliable, cost-effective solution for increasing fiber capacity in existing single-mode installations or deploying new links with minimal fiber resources while maintaining full standards compliance and Huawei-specific compatibility.