How much bandwidth does a VoIP call use?
Posted by Elena Brambilla, Last modified by Daniel Lizaola on 12 December 2017 04:56 PM
The required bandwdidth depends on various factors such as:
- Codec
- Codec samle length
- Protocol stack (IP, PPP, Frame-Relay, etc.)
- Tranmission Network (DSL, ATM, etc.)
- Echo Cancellation

As a general rule of thumb the bandwdith for one call in one direction is between 10 and 110 kb/s.

An excellent overview of how these parameters can be tuned and effect the VoIP bandwdith can be found in the following TechNote.
http://patton.com/technotes/smartnode_qos.pdf
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