100Glight DCI Modules Enable Asia-Pacific ISP Smooth 100G→400G Metro Network Evolution

Author:

Nancy

Client Background

A major Asia-Pacific telecom operator runs a nationwide metro and backbone network serving enterprise leased lines, 5G fronthaul/backhaul, residential broadband, and IDC interconnection. With rapid growth in enterprise cloud adoption, UHD live streaming, and cloud gaming, legacy 100G DCI links lacked bandwidth. The operator aimed to upgrade core metro nodes to 400G with minimum cost, fastest deployment, and smooth migration, while protecting existing fiber, equipment, and infrastructure investments.

Core Challenges

Limited fiber resources; no large-scale new cabling allowed; must upgrade over existing G.652 fiber.
Cross-site distances varied from 10km to 80km, requiring a unified multi-range module platform.
Carrier-class reliability with strict MTBF, anti-lightning, and anti-interference standards.
Compatibility with existing 100G equipment for mixed networking and smooth transition.

100Glight Solution

100Glight provided a carrier-grade 400G DCI optical interconnect solution:

400G QSFP-DD LR4 (10km)
400G QSFP-DD ER4 (40km)
400G QSFP-DD ZR4 (80km)Products meet carrier-grade NEBS requirements, wide-temperature, high anti-interference, long lifetime, fully compatible with existing transmission equipment, supporting 100G/400G mixed transmission.

Deployment & Implementation

The project adopted a core-node-first, regional-rollout model. 100Glight provided on-site survey, link budget calculation, configuration optimization, and launch support. No impact on live services; single-node upgrade within <2 hours. 28 core nodes nationwide completed deployment within 3 months.

Project Results

Metro core links upgraded from 100G to 400G, single-fiber capacity increased 4×.
No new fiber deployment required, protecting existing investments.
Link failure rate reduced by 90%, network availability 99.999%.
Strongly supported 5G-A, enterprise dedicated lines, and cloud interconnection business growth.

Client Testimonial

“100Glight’s DCI optical module solution helped us complete our 400G metro network upgrade at the lowest cost. Stable, compatible, and efficiently delivered. We have included them in our global supplier system for long-term network evolution.”— Transmission Network Director, Asia-Pacific Telecom Operator

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