[Serusers] Call quality

[Evan Borgström]

	Don't forget things like jitter buffers, ECAN and tx/rx gains. All of
these can be used to fine tune quality on calls, especially if the calls
are terminating to a PSTN gateway. For instance on the Cisco 79XX IP
phones dropping the microphone tx gain a couple of decibels (sometimes
as much as -10db) can get rid of a lot of echo and on Sipura ATA's it
makes other things such as G711 uLaw fax pass through more reliable.

-Evan

Edson wrote:
> 1)       QoS (shapping, priority, etc);
> 
> 2)       Codecs (LPC10 (arghhh)? G723.1? ILBC? G729? Speex? GSM? G726?);
> 
> 3)       Bandwidth (num_call * real_codec_bnad_required * 1,2_for_safity +
> num_video * real_video_band * 1,1_for_safity + ..);
> 
>  
> 
> In this order.... ;)
> 
>  
> 
> Edson
> 
>  
> 
>   _____  
> 
> From: serusers-bounces at lists.iptel.org
> [mailto:serusers-bounces at lists.iptel.org] On Behalf Of Mike Cassidy
> Sent: quinta-feira, 29 de junho de 2006 15:34
> To: serusers at lists.iptel.org
> Subject: [Serusers] Call quality
> 
>  
> 
> Can anyone point me in the right direction for resources that could help me
> to improve call quality? I have everything up and running ok, but the
> quality of the calls is a bit ropey at the moment. Any help here would be
> much appreciated.
> 
> Thanks in advance,
> Mike
> 
> 
> 
> 
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