Voice and Telephony - Chathura Ariyadasa (He/Him/His)

VOIP in a Nutshell

SIP Protocol Stack

VOIP Codec Comparison

Codec	Data Rate	Typical Datagram Size	Packetization Delay
G.711u	64.0 kbps	20 ms	1.0 ms
G.711a	64.0 kbps	20 ms	1.0 ms
G.726-32	32.0 kbps	20 ms	1.0 ms
G.729	8.0 kbps	20 ms	25 ms
G.723.1	6.3 kbps	30 ms	67.5 ms

Multi Site CISCO VOIP for Students

Download the CISCO packet tracer and get installed.
Then, draw the diagram as above.
Download the pkt source file.
Download the document, containing all the required commands.
Done

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