Vietnam Optical Line Terminal LPO

Linear Pluggable Optics (LPO) are high-efficiency optical transceivers used in Vietnam's telecom networks to reduce latency and power consumption while supporting high-speed data transmission.

What is LPO?

Linear Pluggable Optics (LPO) are optical transceiver modules designed to shift digital signal processing (DSP) from the module to the host device, such as a switch or network interface card (NIC) . Unlike traditional DSP-based optics, LPO modules use high-linearity analog components like transimpedance amplifiers (TIA), drivers, lasers, and photodiodes to handle signal amplification and transmission . This architecture reduces power consumption, latency, and module complexity, making LPO ideal for short-reach, high-density connections in data centers, AI clusters, and leaf-spine network topologies .

Advantages of LPO in Optical Line Terminals

• Lower Power Consumption: By removing the DSP, LPO modules consume significantly less power than traditional retimed optics, which is critical for large-scale deployments .
• Reduced Latency: Shifting signal processing to the host ASIC minimizes delays, improving synchronization in high-speed networks .
• Cost Efficiency: Simplified module design lowers manufacturing costs and total cost of ownership (TCO) for telecom operators .
• High-Density Deployment: LPO modules support dense port configurations, enabling scalable network expansion in data centers and backbone networks .

Application in Vietnam Telecom

Vietnam Telecom (Viettel) has adopted high-performance optical transceivers, including LPO-based modules, to upgrade its backbone and data center networks . Key initiatives include:

• Upgrading Core Network Capacity: Transitioning from 10G/40G links to 100G and 400G speeds to handle growing traffic.
• Modernizing Data Centers: Supporting cloud migration, virtualization, and high-density server deployments.
• Enhancing Network Resilience: Ensuring minimal downtime and reliable service delivery.
• Optimizing TCO: Balancing performance with energy-efficient, cost-effective solutions. LINK-PP, a global optical module supplier, provides a wide range of LPO-compatible modules to Vietnam Telecom, including SFP+, QSFP28, QSFP-DD 400G/800G, and coherent solutions . These modules support various distances and speeds, making them suitable for data centers, metro networks, and backbone infrastructure.

Considerations

While LPO offers significant advantages for short-distance, high-quality links, it relies heavily on the SerDes capability of the host ASIC and may not provide full DSP compensation for longer or less predictable links . For such scenarios, traditional DSP-based optics remain preferable.

Summary

In Vietnam, LPO technology is transforming optical line terminals and high-speed networks by providing energy-efficient, low-latency, and cost-effective solutions. Telecom operators like Viettel leverage LPO modules from suppliers such as LINK-PP to scale network capacity, modernize data centers, and improve service reliability while maintaining flexibility for future growth .