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In the public switched telephone network PSTN, the following figure shows the IP-PSTN Interworking for voice over IP VoIP, find the definition of the following

1. Voice over Internet Protocol (VOIP): [3 marks]

2. IP-PSTN Interworking [3 marks]

3. Pulse-code modulation (PCM) [2 marks]

4. IP multimedia subsystem (IMS) [2 marks]

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Internet

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