Auditing a network to add Voice

Bret Clark bclark at
Mon Nov 22 09:54:21 CST 2010

Iperf can be used to measure jitter and delay as well as simulate a 
quasi VoIP call. You can also use mtr under Linux which provides jitter 
and delay measurements from one point to another point. A g.729 call 
(lower quality) takes about ~40kbps and a g.711 (high quality) used 
about ~100Kbps of bandwidth. With most of today's networks, the problem 
isn't bandwidth related, but more with jitter, delay, and packet loss 
through the network...personally I'm a big fan of deploying QoS through 
out an infrastructure...well at least in our WAN infrastructure.


On 11/22/2010 09:59 AM, Kasper Adel wrote:
> Hi,
> My customer would like to add VoIP over their network and they asked us for
> an audit. the result of the audit would be simply "you guys are ready for
> it"
> Breaking it down [high level] for me sounds like : (suggestions are more
> than welcomed) :
> 1) Looking at hardware computation finite resources (cpu, memory...etc)
> 2) Looking at available bandwidth
> 3) QoS policy
> 4) High Availability and Fast Convergence
> Any thing else?
> They asked us to measure the KPIs (jitter, delay...etc) of their existing
> traffic, is there a way to do that?
> Thanks,
> Kim

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