Student who satisfactorily completes the assignment should be able to:
1. Compare Standard networks.
2. Analyze the features of traditional voice telephony to modern switching networks.
Write a report (with Introduction, Objectives, Gathered Data with diagram and explanation, Analysis, and conclusion for each number) on the following:
1. Find out at least one modulation technique used in 1. Ultrasound and 2. ADSL. Explain these techniques in detailed manner.
2. Explain the history and uses of Centrex with suitable environment diagram. Discuss how Centrex differs from PSTN in communication process.
3. For the bit pattern 1 1 0 0 1 0 0 1 1 0, draw the modulated waveform signals for ASK & PSK. Discuss how Audio Frequency-Shift Keying (AFSK) is differed from Dual-tone Multi-Frequency (DTMF).