1. CIT 307 Online Data Communications High Speed Digital Access Module 10 Kevin Siminski, Instructor

2. ADSL ADSL is an asymmetric communication technology designed for residential users; it is not suitable for businesses.

3. Local loops The existing local loops can handle bandwidths up to 1.1 MHz.

4. ADSL ADSL is an adaptive technology. The system uses a data rate based on the condition of the local loop line.

5. DMT

6. Subdividing Bandwidth

7. ADSL Modem

8. DSLAM

9. Cable Modems – Traditional system

10. Traditional Cable Communication in the traditional cable TV network is unidirectional.

11. HFC Network

12. HFC Cable Communication in an HFC cable TV network can be bidirectional.

13. Coaxial Cable bands

14. Bandwidth on Coaxial. The theoretical downstream data rate is 30 Mbps. The theoretical upstream data rate is 12 Mbps.

15. Cable Modem

16. CMTS

17. SONET Synchronous Optical NETworking This technology is the backbone of the telephone network!

18. Clocking in a SONET system SONET is a synchronous TDM system controlled by a master clock.

19. A SONET network

20. SONET rates STSOCRate (Mbps)SPE (Mbps)User (Mbps) STS-1OC-151.8450.1249.536 STS-3OC-3155.52150.336148.608 STS-9OC-9466.56451.008445.824 STS-12OC-12622.08601.344594.432 STS-18OC-18933.12902.016891.648 STS-24OC-241244.161202.6881188.864 STS-36OC-361866.231804.0321783.296 STS-48OC-482488.322405.3762377.728 STS-192OC-1929953.289621.6049510.912

21. STS Multiplexing