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Understanding Voice over IP

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Unnderstanding Voice over IP 1 :
This course provides you with a big-picture view of Voice over IP, understanding each component of a VoIP system including softswitches and gateways, the standards like RTP and SIP that are used, and all of the different ways VoIP can be implemented.
Unnderstanding Voice over IP 2 :
This course provides you with an understanding of how voice is packetized, the factors that can affect sound quality, all of the different codecs that can be used, RTP and jitter buffers, QoS, MPLS, Diff-Serv and Service Level Agreements.
Unnderstanding Voice over IP 3 :
This course provides you with a solid working knowledge of SIP and IP call flow, as well as the options for connecting VoIP systems to the PSTN, LECs and IXCs.

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