Panasonic KX-NS1000 Installation Manual page 356

8.3.4 Bandwidth Requirements
Note that the amount in the table is only a guide. Subscribe to a network that has enough bandwidth. If the
amount of bandwidth required for VoIP communications is larger than what the network can accommodate,
speech quality will be compromised.
Required Bandwidth for Each Channel
The required bandwidth depends on what combination of codecs and packet sending interval is used. Keep
in mind the following points about the type of codec and packet sending interval, in terms of the speech quality:
•
The speech quality of the codecs varies as follows: G.711 (High), G.729A (Low)
•
The shorter the packet sending interval, the higher the speech quality.
•
The higher the speech quality the V-SIPGW16 card provides, the more bandwidth the WAN requires.
Codec
G.711 110.4 kbps
G.729A 54.4 kbps
356 Installation Manual
10 ms 20 ms
87.2 kbps
31.2 kbps
Packet Sending Interval
30 ms 40 ms
79.5 kbps 75.6 kbps
23.5 kbps 19.6 kbps
50 ms 60 ms
73.3 kbps 71.7 kbps
17.3 kbps 15.7 kbps