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CCNA Voice Quick Reference by Michael Valentine

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Understanding VoIP

The elements of traditional telephony—status, address and supervisory signaling, digitization, and so on—must have functional parallels in the VoIP world for systems to function as people expect them to, and more importantly, for VoIP to interact with the PSTN properly.

This section examines packetizing digital voice, signaling, and transport protocols, the components of a VoIP network, and the factors that can cause problems in VoIP networks and how they can be mitigated.

Understanding Packetization

IP networks move data around in small pieces known as packets. Because we know how to digitize our voice, it now becomes just another binary payload to move around in a packet. VoIP uses Digital Signal Processors (DSP) for the ...

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