Bandwidth for voice data, call control (signalling), and system control between units must be
considered when site planning.
R
equired Bandwidth per Call for Voice : Determined by CODEC and Packet Sending Interval
R
equired Bandwidth per Call for Signaling
Phone Type Required Bandwidth
IP Telephones (except SIP phones) 7.2kbps
SIP Phone 16.0kbps
CODEC
Packet Sending Interval
20ms 30ms 40ms 60ms
G.711 / G.722 80kbps 74.7kbps 72kbps 69.4kbps
G.729A 24kbps 18.7kbps 16kbps 13.4kbps
Bandwidth (1/4)
NB: In addition to the above, Basic Ethernet frame, VPN headers, etc., should also be considered.
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