An Example for G.711, No Compression over
Ethernet, 20 ms Samples
Sample period = 20 ms Packets per second = 50/s
CODEC = G.711 Sample size = 160 B
Header size (40 B w/o cRTP, 4 B with) = + 40 B
Data Link overhead = + 18 B
Total packet = sample + header + data link = 218 B
* Packets per second = × 50/s
10900 B/s
Multiply by 8 to get b/s × 8 b/B
87200 b/s
Divide by 1000 to get kbps / 1000 kb/b
87.2 kbps
Additionally, allot 30–73 bytes for IPSec headers if used.