Key Takeaways:
- Over 40 metros now offer AT&T’s 400G wavelength connectivity, engineered for enterprise performance and data-intensive workloads
- High-capacity circuits are available in select markets, with growth designed to bring high-speed optical connectivity closer to major business and cloud ecosystems
- 400G wavelength handoff capability is enabled across 440,000 properties serving more than 2.3 million business tenants, with rapid deployment within 15 days, where eligible
AT&T Business today announced the expansion of 400G wavelength connectivity into additional U.S. metros, another step in scaling the company’s business-grade network built to support AI-era traffic. With 400G wavelength edgeless handoff capability enabled across 440,000 properties serving more than 2.3 million business tenants, and rapid deployment within 15 days (where eligible), AT&T is extending faster, more reliable connectivity into more places enterprises operate.
New 400G‑enabled U.S. data center locations include: Ashburn, Virginia; Atlanta; Chicago; Columbus, Ohio; Dallas; Denver; Englewood, Colorado; Kent, Washington; Los Angeles; Miami; New York; Portland, Oregon; San Jose, California; Seattle; Secaucus, New Jersey; and Tempe, Arizona.
As organizations operationalize AI across multiple locations, cloud on-ramps, and distributed sites, network requirements are shifting from “more bandwidth” to high-throughput, predictable performance, and reliability at scale. AI training and inference, data replication, and analytics pipelines increasingly depend on secure, resilient connectivity between locations where data is created, processed, and stored. By extending 400G deeper into more metros, AT&T is advancing a network designed to connect AI from anywhere to the cloud, while keeping security embedded in the network, not layered on top.
How 400G Supports AI Across Sites, Edge, and Cloud
400G wavelength connectivity supports how enterprises use AI today by enabling:
- Faster, more reliable data movement between data locations, cloud interconnect points, and distributed sites, so applications and AI workflows perform consistently.
- AI access from anywhere to the cloud, including branch locations, campuses, and edge environments that need high-capacity connectivity to centralized compute and cloud services.
- Scalable capacity for AI-era demand, reducing the need to stitch together multiple smaller circuits as workloads grow.
“As enterprises scale AI and data-intensive applications, they need a network foundation that can grow with them and deliver the capacity and consistency required between the places where data is created, processed, and stored,” said Viraj Parekh, vice president of converged networking, AT&T Business. “By expanding 400G wavelength connectivity into additional metros, we’re giving businesses more options to connect AI from anywhere to the cloud with confidence.”
Industry Perspective
As AI-driven workloads reshape network requirements, analysts point to high-capacity infrastructure as a critical enabler of performance and scale.
Frost & Sullivan: “AT&T’s wavelength services reflect the infrastructure rigor required for the AI era. With speeds up to 400 Gbps, extensive network of fiber route miles and fiber‑lit buildings, and a successful 1.6 Tbps single-carrier wavelength trial, AT&T has the scale and resilience needed for next‑generation workloads. Express Waves powers this position by delivering pre‑provisioned 100 Gbps and 400 Gbps wavelength services on high‑demand long‑haul routes. Express Waves compresses turnup timelines to as little as 24 hours and enables immediate handoff, faster deployment, and accelerated time to market for latency‑sensitive, data‑intensive enterprise and cloud ecosystems.” - Amrit Singh, Industry Principal, Information Communications Technology
400G Expansion Into New Metros
AT&T’s 400G expansion is driven by long‑standing relationships with more than 130 carrier hotels nationwide, leveraging an edgeless design that helps extend high‑capacity wavelength connectivity without requiring traditional network edge builds at every location. By anchoring 400G at key interconnection hubs where cloud, network, and enterprise traffic converge, AT&T can currently provide 400G wavelength connections at more than 130 locations with consistent handoff, predictable performance, and greater flexibility as connectivity needs scale.
400G wavelength circuits are available in select markets. Availability and deployment timelines may vary by metro and route. To learn more or check 400G wavelength availability in your metro, please contact your AT&T Business representative or visit business.att.com/products/wavelength-services.
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