The Qos PipeDream [Was: RE: Two Tiered Internet]

Sun Dec 18 22:29:26 UTC 2005

Jay Hennigan wrote:

> 
> 
> VoIP by design will have high PPS per connection as opposed to data flows.
> At 20 ms sample rates you have 50 pps regardless of the CODEC or algorithm.
> Increasing the time per sample to 40 ms would cut this in half but the 
> added
> latency would result in degraded quality.  In addition, longer sample times
> would suffer much more degradation if there is packet loss.

My point is that sampling length should take into effect the rtt. A rtt 
of 200ms tolerates far shorter sampling slices than does 20ms.