14.1.2.4 ISDN HDLC-RawIP (isdn)
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shows the net bandwidth required by commonly used codecs. Some codecs are used
at different bandwidths. In this case the maximum bandwidth is given.
Codec
max. bandwidth (bit/s)
G.711
64000
G.722
64000
G.722.1
32000
G.723.1
6400
G.726
40000
G.728
16000
G.729
8000
GSM
13000
iLBC
15200
Max. number of concurrent calls
Enter the expected maxium number of simultaneous calls on this interface. It is used
to calculate the overall bandwidth that needs to be reserved for VoIP traffic. The value
"0" will disable this feature.
The total bandwidth of the link must not be exceeded.
Bitrate of the codec used
Enter the net bandwidth of the codec to be used. Take the codec with the largest
bandwidth if different codecs are in use.
When calculating the total required bandwidth the system
will automatically take the IP overhead into account. Lower
bandwidth consumption causes more overhead.