Technical IT and Telecommunication Core Competencies : 

1. Mobile network

2. Broadband

2.1 Products

2.2 Access

2.3 Protocols

2.4 Markets

3. Private Branch Exchanges
3.1 Products

3.2 Protocols

3.3 Market

3.4 Hardware

4. Narrow band network

4.1 Products

4.2 Protocols

4.3 Peripheral networks

4.4 Central Components of Siemens networks

4.5 Specific Hardware

4.6 Market Analysis

5. Operator Places

6. Access

7. Operation und Maintenance

8. IT / IP network and applications