[asterisk-users] How to create distortion, echo, and chopping sound in a SIP trunk?

[Olle E. Johansson]

2 maj 2011 kl. 18.09 skrev Hans Witvliet:

> On Thu, 2011-04-28 at 11:25 -0400, Bruce B wrote:
>> Hi everyone,
>> 
>> 
>> How can I introduce some distortion, echo, chopping sound and all
>> other bad quality things that can happen to a SIP trunk? I have plenty
>> of bandwidth and crisp clear lines so the only thing that I can think
>> of is to limit bandwidth but even that requires quite some scripting
>> work. 
>> 
>> 
>> Is there any easy way to simulate a distorted SIP line temporarily for
>> testing?
> 
> You can intruduce a predefined amount of "distortion" on your ip-connection
> (packet loss, fluctuating delay, out of secuence reception of packets,
> limited bandwith)
> 
> All of these will have a serious impact on your VOIP-connection.
> 
> See "lartc" about it.
> Good thing about it, is that you pre-define how bad a line is, and it
> produces re-producable results

I use a laptop with a usb-ethernet connected in bridge mode as a "voip destroyer".
Using TC you can inject a lot of bad stuff on the connection.

/O