Number of Simultaneous Calls
The
number of simultaneous calls is proportional to number of extensions registered to the PBX, as shown in
the chart below. The proportion is approximately 0.25 when the number of registered extensions is 100. For
more information about the number of simultaneous calls, ask your local Panasonic dealer.
0
10
20
30
40
50
60
70
80
90
100
30020010010 50 150 250
Number of Simultaneous Calls
Number of Registered Extensions
Number of Registered
Extensions
10 50 100 150 200 250 300
Number of Simultaneous
Calls
6 16 26 35 44 53 61
Required Bandwidth per Call for VoIP Communication
The required bandwidth for VoIP communication is determined by the codec used and the packet sending
interval.
Codec
Packet Sending Interval
20 ms 30 ms 40 ms 60 ms
G.711/G.722 80 kbps 74.7 kbps 72 kbps 69.4 kbps
G.729A 24 kbps 18.7 kbps 16.0 kbps 13.4 kbps
*1
G.722
is only available for calls between KX-NT300 series IP-PTs, KX-NT500 series IP-PTs, and some SIP phones that support this
codec during peer-to-peer communication. For details, refer to "5.2.3 Peer-to-Peer (P2P) Connection" in the Feature Guide.
Required Bandwidth per Call for Signalling
In a One-look network, a certain amount of bandwidth is required for the master unit to handle all the calls in
the network. The required bandwidth depends on the type of IP telephone.
Phone Type Required Bandwidth
IP Telephones (except SIP phones) 43.0 kbps
SIP Phone 16.0 kbps
Example:
The following examples show different cases of assessing bandwidth for a One
-look network.
360 Installation Manual
8.4.1 One-look Network
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