Alphabetical Reference
167
Bandwith calculation for Ethernet
2. WAN (e.g. ATM)
WAN-Overhead
Voice Codec Packet size
[ms]
Payload
Bytes
Ethernet
Packet size
[Bytes]
Used Ether-
net-Band-
width incl.
Preamble
[kBit/s]
G.711
1
1 In the SIP environment it is possible to activate silence supression. In this case the band-
width calculation values are max values
10 80 150 120,0
G.711
2
20 160 230 92,0
G723
2
2 For G.723 it is not possible to activate silence suppression and the only available sample
size is 30 ms
30 24 94 25,1
G.729
3
3 In the SIP environment silence suppression is always active currently. In this case the band-
width calculation values are max values.
10 10 80 64,0
G.729
3
20 20 90 36,0
G.722
4
4 For G.722 it is not possible to activate silence suppression.
10 80 150 120,0
G.7224 20 160 230 92,0
Protocol Bytes
RTP 12
UDP 8
IP 20
ATM-Overhead 5
Total
45
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