SRM University 2007 B.Tech Electronics and Communications Engineering Bank for Communication Switching Techniques - Question Paper

PART-B
1. Explain in detail about a Telephone Circuit.
2. Explain in detail about the Functions of a Switching System.
3. Discuss in detail about A) Pulse Dialing B) Multi Frequency Dialing.
4. Discuss about the various Signalling tones with the Signalling trend diagrams.
5. Explain with neat diagram about the step-by-step (or) Strowger Switching Components.
6. Discuss in detail about the configuration of Strowger(or) Step-Step-by Switching with neat diagram.
7. With neat block diagram discuss about the principle of Common Control Switching System.
8. Describe the principle of Crossbar Exchange and Crossbar Switch Configuration.
9. Discuss about the Data Transmission over PSTN networks.
10. Discuss in detail about the various switching techniques in data networks.
11. Explain about the Satellite based Data Networks in detail.
12. Explain about the Fiber optic Data Networks in detail.
13. Classify the various kinds of signaling techniques used in Telephone Networks and write short notes about every.

UNIT – II
PART-A
1. What is busy hour traffic?
2. Write Erlang –B Formula.
3. What is busy hour traffic?
4. What is Time consistent Busy hour?
5. Define Call Completion Rate.
6. Define BHCA.
7. Define Busy hour Calling Rate.
8. An Exchange serves 2000 subscribers. If the avg. BHCA is 10,000 and CCR is 60% obtain BHCR.
9. In a group of 10 servers every is occupied for 30 minutes in an observation interval of two Hrs. obtain Traffic carried out by the group.
10. A group of 20 servers carry traffic of 10 erlangs. If the avg. duration of a call is 3 minutes, compute the number of calls put through by a single server and the group as a whole in a one-hour period.
11. A subscriber makes 3 phone calls of 3 minutes, 4 minutes and 2 minutes duration in a 1 hour period. compute the subscriber traffic in Erlangs, CCS, and CM.
12. Over a 20 minute observation interval, 40 subscribers initiate calls. Total duration of the calls is 4800 seconds. compute the load offered to the network by the subscribers and the avg. subscriber traffic.
13. Define GOS.
14. Define Blocking Probability.
15. Define CCS. Write the relationship ranging from CCS, CM and CS.
16. Define Traffic intensity and what the unit of traffic intensity is.
17. Write the difference ranging from Call Congestion and Time Congestion.
18. Define QOS.
19. Define LCC.
20. Define LCR.
21. Define LCH.
22. What is meant by Erlang (or) Pure chance traffic of type-I?

Earning:   Approval pending.