LTE-FDD and LTE-TDD

Glossary page

FDD-LTE (Frequency Division Duplexing) and TDD-LTE (Time Division Duplexing) are two different 4G variants that use an existing broadband spectrum differently. FDD-LTE uses different frequency bands for downloading and uploading, while TDD-LTE uses a band with a time offset for transmitting and receiving. Switching between uplink and downlink happens so quickly that it is not noticeable to the user. FDD-LTE is considered the modern 4G variant and is the most widespread worldwide.

https://www.4g.de/service/lexikon/fdd-lte-und-tdd-lte/ external-link

Latest webinars

Latest articles

Blog Post Cover

T-Systems is now Catena-X-certified for Traceability use case

T-Systems’ Connect & Integrate solution is now officially Catena-X-certified for the Traceability use case under the latest Saturn release. This certification expands T-Systems’ growing portfolio of Catena-X capabilities and reinforces its role in enabling secure, interoperable data exchange across automotive supply chains. By supporting traceability, quality processes, and collaboration through standardized dataspaces, T-Systems helps companies gain transparency across complex value chains, improve compliance, and respond faster to supply chain disruptions while maintaining full data sovereignty within the Catena-X ecosystem.

Read more

external-link
Author image

Andrea Garcia

Mar 09, 2026

Blog Post Cover

T-Systems and German Edge Cloud join forces

T‑Systems and German Edge Cloud are joining forces to deliver integrated, ready‑to‑use digital solutions for industrial data ecosystems such as Catena‑X. By combining T‑Systems’ expertise in integration and connectivity with German Edge Cloud’s ONCITE Industrial SaaS solution, the partnership enables scalable applications for traceability and Industrial AI, provided via the Telekom Cloud. This collaboration helps manufacturing companies implement use cases quickly, achieve seamless integrations, and generate measurable value across the entire supply chain. The goal is to build open, interoperable digital ecosystems that accelerate and sustain digital transformation in the manufacturing industry.

Read more

external-link
Author image

Sven Löffler

Feb 26, 2026

Blog Post Cover

End-to-end solution for carbon footprint in the supply chain

T‑Systems and IPOINT have launched an end‑to‑end solution that enables automotive manufacturers and suppliers to track product carbon footprints across global supply chains. By combining IPOINT’s sustainability software with T‑Systems’ access to the Catena‑X data ecosystem, the solution supports transparent emissions reporting in line with EU CSRD requirements and provides actionable insights for reducing environmental impact.

Read more

external-link
Author image

Sven Löffler

Feb 25, 2026