[Asterisk-Users] Audio Drops out at Random - one way

[WipeOut]

Craig Waddington wrote:

> Have a strange problem.
>
> 2 different asterisk servers, running different CVS.
>
> One behind Firewall, one not.
>
> Cisco 7940 phones.
>
> Over the past two weeks, users have had a problem with one way audio, 
> after about 2 minutes into a call, they can hear the other person, but 
> the other person cannot hear them, this happens for about 3-5 seconds, 
> then all is fine again.
>
> It doesn’t happen on every call, about one in 5.
>
> Hardware is good, 2mb Connection, QOS enabled.
>
> If it was only one Asterisk server I would be ok, but it happens on 
> two completely different places.
>
> I cannot work out what is causing it, can anyone offer anyone offer a 
> solution or a method to track this down.
>
> Thanks.
>
>------------------------------------------------------------------------
>
>  
>

I have a similar problem with my IAX connection to my termination 
provider.. No one seems to be able to help and I have replaced or 
reinstalled just about every component in the chain except the internet 
itself and the termination provider..

Have updated Asterisk to 1.0.2, have added a switch to my network (was 
using a hub), have changes to a different firewall, have setup port 
mapping through the NAT, have tried different DSL routers and put in a 
high quality microfilter..

So the only things I think it can be are a) my termination provider (but 
they service many people and I am sure others would have brought it up 
if it was a problem), b) Asterisk itself or c) my DSL line or ISP..

Unfortunately these are all hard to check and the debug logging on 
Asterisk didn't help much when I tried looking at it..

I know this doesn't help much but if you come up with anything please 
let me know.. Its driving us crazy having calls drop on us especially 
when talking to customers..

Later..