Import 25g Cwdm Optical Transceiver Module — Buy in wholesale FOB from Supplier in China

The Glsun Science And Tech Co., Ltd. SFP-25G-CWDM-1270-10-T02 is a 25.78 Gbps SFP28 transceiver engineered for 25Gb/s single-lane optical links over single-mode fiber at distances up to 10 km. It operates across the CWDM wavelength grid from 1270 nm to 1370 nm, using a DFB CWDM transmitter paired with a duplex LC connector interface. The module targets cost-sensitive deployments requiring stable performance in telecom and data centre interconnect applications.

The transceiver employs a DFB (Distributed Feedback) laser design, which delivers the narrow spectral linewidth and temperature stability required for CWDM multiplexing without active cooling. Extinction ratio is specified at 3.5 dB minimum, a standard threshold for 25G NRZ signalling that ensures adequate eye margin at the receiver. Power consumption figures are not stated in the source data; buyers should request the maximum rated wattage and thermal derating curve, as these directly affect host system thermal budgets and pluggable density in 1RU switches.

Typical applications include 5G fronthaul, metro Ethernet, and data centre-to-data centre links where single-fibre duplex operation and 25G lane rates align diagramme compatibility with Cisco and other mainstream switch platforms. The 10 km reach suits campus and metropolitan deployments without amplification. Buyers should confirm compatibility matrices with their specific host equipment, as firmware vendor locking remains common in this product category. Incoterms, lead time, and MOQ are not disclosed and require direct negotiation with Glsun Science And Tech Co., Ltd.

Glsun Science And Tech Co., Ltd. is headquartered at No. 8 High-Tech Industry Park, Guilin, Guangxi 541004, China, placing it in southwestern China rather than the more concentrated eastern optical manufacturing clusters. The supplier holds an 'imported' tier classification with a 'harbor' trust designation, indicating platform-processed verification without strong independent audit signals. Response rate and average response hours are both recorded at zero, which suggests either a new listing, a dormant account, or a data collection gap rather than definitive trading activity.

The listing provides no stated employee count, annual revenue, production capacity, ISO certifications, or named client references. The product description centres on a single part number with Cisco compatibility as its primary commercial hook. Buyers should treat this as a manufacturer or trading house with unverified scale, and conduct standard due diligence on factory audit reports, RMA processes, and optical test data before committing to volume orders.