VOIP Bandwidth consumption naturally depends not only on the codec used, but also the percentage of packet loss. The calculator below will give you a good idea of the bandwidth and voice call quality for various codecs and packet loss percentages. For more detailed information, visit the Cisco website.

For a detailed abstract concerning speech quality for internet telephony, download the Objective Speech Quality Measures for Internet Telephony (pdf)

(Note: the question mark graphics along each field will give you more information on that field via small popups. To open, simply run the cursor over the question mark. If your browser is blocking popups, press the "ctrl" key to disable temporarily.)

Select Codec Type	G.711 no PLC G.711 PLC G.723.1 5.3k G.723.1 6.3k G.729 G.729A ILBC 13k ILBC 15k
Select Frame Size	2.5mS 5mS 10mS 20mS 30mS
Packet Loss Rate (%)	0 1 2 3 4 5 6 7 8 9 10 15 20 25 30 40 50
MOS (Mean Opinion Score)
R Factor
Bandwidth (kilobits per second)

Questions? Contact us today and we can arrange a VoIP Readiness Asssessment for your enterprise.