ESE TELECOM SWITCHING & SIGNALLING.doc - END SEMESTER EXAMINATION B TECH(E&T COURSE CODE BTTTT 30603 SUBJECT TELECOM SWITCHING AND SIGNALLING

ESE TELECOM SWITCHING & SIGNALLING.doc - END SEMESTER...

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END SEMESTER EXAMINATION B TECH (E&T) COURSE CODE: BTTTT 30603 SUBJECT: TELECOM SWITCHING AND SIGNALLING Duration: 03hrs Max Marks 60 Note: Attempt any five questions. All question carry equal marks. 1. (a) How are switching systems classified? In what way stored programme control superior to hard-wired control? (b) In Strowger exchanges a call may be blocked even though an appropriate path through the switch exists. Explain how this can happen? (c) A busy tone does not imply that the called party is actually engaged in conversation. Explain the reason? 2. (a) Draw & explain circuit for a half duplex telephone with side tone coupling. (b) Give different switching network configuration and explain where we use folded & non –folded network. (c) Give block diagram of a switching system & explain working. (d) Give difference between Single termination & multiple termination switchboards. 3. (a) Derive the expression for time of unavailability for a single processor & Dual processor system.
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  • Summer '18
  • Shiv
  • Markov chain, Andrey Markov, Telephone exchange, Blocking, Signaling System 7, different switching network

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