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 Company Certificate Management

T-Systems has been officially certified by Catena-X for the Company Certificate Management use case—marking a key milestone for secure and scalable data collaboration in the ecosystem. With our Connect & Integrate solution, companies can get started quickly and in full compliance, without technical complexity. The fully Catena-X-compliant infrastructure (CX-0135) includes features like automated expiry alerts, revocation handling, and seamless integration with internal systems. This helps organizations manage digital identities more efficiently and build trust across company borders.

Read more

external-link
Author image

Andrea Garcia

Jul 25, 2025

Blog Post Cover

ADIS: Traceability & PCF in Catena-X

ADIS, a leading Tier-1 supplier, partnered with T-Systems to enable scalable, Catena-X-compliant data exchange. Leveraging the "Connect & Integrate" solution, ADIS achieved fast onboarding via a sandbox-to-Pre-Prod approach, enhancing traceability and carbon footprint visibility. This strategic move aligns with industry standards, ensures regulatory compliance, and supports long-term participation in the evolving Catena-X ecosystem—without major in-house development.

Read more

external-link
Author image

Andrea Garcia

Jun 10, 2025

Blog Post Cover

Making manufacturing systems talk to each other

Interoperability in manufacturing is often misunderstood. Not because companies doubt its importance, but because it's difficult to visualize what success looks like. This blog uses simple analogies to explain the core challenges: outdated machines that can’t “speak” to modern systems, and people hesitant to share data without context or trust. With solutions like Asset Administration Shells and Data Spaces, manufacturers can unlock hidden value, foster secure collaboration, and take real steps toward digital transformation.

Read more

external-link
Author image

Nick Jephcott

May 18, 2025