User Guide

Alphabetical Reference
167
Bandwith calculation for Ethernet
(Values in brackets – security enabled)
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
*
* In the SIP environment it is possible to activate silence supression. In this case the band-
width calculation values are max values
10 80 (90) 150 (160) 120,0 (128,0)
G.711
**
20 160 (170) 230 (240) 92,0 (96,0)
G723
**
** For G.723 it is not possible to activate silence suppression and the only available sample
size is 30 ms
30 24 (34) 1014 (114) 25,1 (30,4)
G.729
***
*** In the SIP environment silence suppression is always active currently. In this case the band-
width calculation values are max values.
10 10 (20) 80 (90) 64,0 (72,0)
G.729
***
20 20 (30) 90 (100) 36,0 (40,0)
G.722
****
****For G.722 it is not possible to activate silence suppression.
10 80 (90) 150 (160) 120,0 (128,0)
G.722**** 20 160 (170) 230 (240) 92,0 (96,0)
Protocol Bytes
RTP 12
UDP 8
IP 20
ATM-Overhead 5
Total
45