[Asterisk-Users] Sip bandwidth usage

[Paulo Mannheimer]

This is exactly what I did. 

I used Xten's GSM driver to call a Zap extension. Readings where 100
Kbits/s. Using uLAW returned 80 Kbits/s !!!

I also downloaded Xten pro to test their g729 codec, readings were even
worse.

That's why I'm so intrigued.

-----Original Message-----
From: asterisk-users-admin at lists.digium.com
[mailto:asterisk-users-admin at lists.digium.com] On Behalf Of WipeOut
Sent: quinta-feira, 30 de outubro de 2003 10:24
To: asterisk-users at lists.digium.com
Subject: Re: [Asterisk-Users] Sip bandwidth usage


Paulo Mannheimer wrote:

>That's weird. I've done some testing both with GS and Xten products, 
>and my iptraf readings show much more than your numbers.
>
It depends on how you did your tests..

If you ran iptraf an PC1 and made a call from PC2(X-Lite) to GS and your

sip.conf entry for either have canreinvite=no then you will get double 
the traffic..

Best bet is to run iptraf on the Asterisk box and then make a call from 
the phone to Asterisk (eg to voicemail, echo test, the pstn or a Zap 
channel) so that the IP traffic is only one client making a call to 
Asterisk using the selected codec.. That should give you the best
reading..

Later..

>Paulo Mannheimer wrote:
>
>  
>
>>Hi All-
>>
>>I'm working on a project that will have remote (internet)access to an 
>>*
>>    
>>
>
>  
>
>>server through SIP phones, either soft or hard ones.
>>
>>Does anyone have any experience to share about which SIP product they
>>are using under similar conditions, as well as which codec is being 
>>used and bandwidth usage?
>>
>>TIA!
>>
>>PauloHM
>>
>> 
>>
>>    
>>
>Depends on the phone.. If you are using a Grand Stream then the best 
>you
>
>will get is G.711 (+- 85Kb/s including overheads)..
>
>If you are using Snom's or X-Lite/X-Pro you have the option to use the
>GSM (+- 34Kb/s including overheads) codec..
>
>X-Lite/X-Pro also support iLBC (+- 28Kb/s including overheads) although
>it does not currently work with Asterisk, and GrandStream have said
they
>
>are going to support it as well soon..
>
>All the phones have support for G.729 (+- 22Kb/s) either as standard or
>by buying a sepertate licence.. Including Asterisk..
>
>Hope that helps..
>
>
>
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>  
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