Panasonic KX-NS1000 Installation Manual page 237

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
10 ms
G.711 110.4 kbps
G.729A 54.4 kbps
Packet Sending Interval
20 ms 30 ms
87.2 kbps 79.5 kbps
31.2 kbps 23.5 kbps
7.3.4 Bandwidth Requirements
40 ms 50 ms
75.6 kbps 73.3 kbps
19.6 kbps 17.3 kbps
60 ms
71.7 kbps
15.7 kbps
Installation Manual 237