[Asterisk-Users] Re: TDM400P digium card

[mustardman29]

Would QoS on a managed switch solve the ARP problem? 

> -----Original Message-----
> From: Alan Ferrency [mailto:alan at pair.com] 
> Sent: Wednesday, March 01, 2006 7:27 AM
> To: asterisk-users at lists.digium.com
> Subject: [Asterisk-Users] Re: TDM400P digium card
> 
>  "Nora Lavelle" <nora at silverspringnet.com> wrote:
> 
> > Thanks dewey. Any feedback on how to debug this issue ?
> 
> Regarding sound quality issues with Sipura SPA-841 phones and 
> Asterisk, please check out this page I created on the voip-info Wiki:
> 
> http://www.voip-info.org/wiki/view/Asterisk+SPA-841+Sound+Quality
> 
> Specifically, if you have not set the SPA-841's "RTP packet 
> size" and "Silence Suppression" parameters correctly, then 
> you _will_ have sound quality issues.
> 
> After that: Are your phones sharing the same network segments 
> as your non-VoIP ethernet data? Do you have a lot of ethernet 
> traffic? We found that even on a fully switched network, if 
> the SPA-841's received excessive ARP traffic (which is 
> broadcast to all switch segments, even though most other 
> network packets are suppressed), we had periodic "robot 
> voice" sound issues.
> 
> Check this out, and see if it helps.
> 
> Thanks!
> 
> Alan Ferrency
> pair Networks, Inc.
> alan at pair.com
> 
> 
>