G.729 Compression... Audio sporadically sounds robotic

[Acoustech]

Hi,

I recently visited San Francisco to install 15 i2002 phones, VoIP to to our CS1000 in New York. I applied g.729 voice compression to the phones and there's nothing else going over the MPLS circuit that the phones are using to get to our CS1000 in NY... but sometimes the audio over the phones sounds jumbled and robotic. At other times, it sounds perfect. Does anyone have any tips for us?

 

[crac74]

Hi,

Do you use any kind of encryption between your 2 locations ?
Is it a private MPLS link or a provider's MPLS link ?
It seems to be a QoS problem.

 

[marc3lo]

QoS Problem

 

[tromas]

Check out

http://www.pingplotter.com

and download the free 30 day trial for pingplotter pro.
Run a "trace" on the IP addy and it will show you what hop the latency is in. Could be anything from a bad ethernet cable, router or softprompt, but this will narrow it down.