[cisco-voip] Per Call Bandwidth consumption

[Michael Thompson]

This has come up a couple times in recent conversations with cohorts, so I
thought I would share this as a refresher.

 

This is shamelessly plagiarized from the following link (also, just in case
the formatting doesn't come through).

 

http://www.cisco.com/en/US/partner/tech/tk652/tk698/technologies_tech_note09
186a0080094ae2.shtml

 

 


Codec Information

Bandwidth Calculations


Codec & Bit Rate (Kbps) 

Codec Sample Size (Bytes)

Codec Sample Interval (ms)

Mean Opinion Score (MOS) 

Voice Payload Size (Bytes)

Voice Payload Size (ms)

Packets Per Second (PPS)

Bandwidth MP or FRF.12 (Kbps) 

Bandwidth w/cRTP MP or FRF.12 (Kbps) 

Bandwidth Ethernet (Kbps) 


G.711 (64 Kbps) 

80 Bytes

10 ms

4.1

160 Bytes 

20 ms

50

82.8 Kbps 

67.6 Kbps 

87.2 Kbps


G.729 (8 Kbps)

10 Bytes 

10 ms

3.92

20 Bytes 

20 ms

50

26.8 Kbps 

11.6 Kbps 

31.2 Kbps


G.723.1 (6.3 Kbps) 

24 Bytes

30 ms

3.9

24 Bytes 

30 ms

34

18.9 Kbps 

8.8 Kbps 

21.9 Kbps


G.723.1 (5.3 Kbps) 

20 Bytes

30 ms

3.8

20 Bytes 

30 ms

34

17.9 Kbps 

7.7 Kbps 

20.8 Kbps


G.726 (32 Kbps) 

20 Bytes

5 ms

3.85

80 Bytes 

20 ms

50

50.8 Kbps 

35.6 Kbps 

55.2 Kbps


G.726 (24 Kbps) 

15 Bytes

5 ms

 

60 Bytes 

20 ms

50

42.8 Kbps 

27.6 Kbps 

47.2 Kbps


G.728 (16 Kbps) 

10 Bytes

5 ms

3.61

60 Bytes 

30 ms

34

28.5 Kbps 

18.4 Kbps 

31.5 Kbps

 

 

 

 

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