Hi everybody: How much internet bandwidth and spees is enough to handle twenty simultanous SIP calls. --------------------------------- Do you Yahoo!? The all-new My Yahoo! – Get yours free! -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.digium.com/pipermail/asterisk-users/attachments/20041118/b77f73f7/attachment.htm
Hi Hammoud, It all depends on the codec that you are using. Best case scenario is with G723 codec 6.3Kbps per channel * 20, around 126K without the overhead. But you problably won't be able to use this codec unless you are in passthru mode (license is pretty expensive). Using g729 you will be using 8K so a total of 240K+ total bandwidth (passthru OK but you can purchase the license from digium)... Kido ----- Original Message ----- From: chawki hammoud To: asterisk-users@lists.digium.com Sent: Thursday, November 18, 2004 7:55 AM Subject: [Asterisk-Users] internet bandwidth Hi everybody: How much internet bandwidth and spees is enough to handle twenty simultanous SIP calls. ------------------------------------------------------------------------------ Do you Yahoo!? The all-new My Yahoo! - Get yours free! ------------------------------------------------------------------------------ _______________________________________________ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.digium.com/pipermail/asterisk-users/attachments/20041118/d5f7534c/attachment.htm
/SNIP/ Some corrections are needed: 6.3kbps of G723.1 will become around 17kbps on the IP level without silence suppression because of the additional overhead imposed by protocols like RTP, IP, etc . If you add the Ethernet (or WAN protocol overhead) this will increase even more (although slightly). Similarly, a voice stream of G729 at 8kbps will become around 24kbps on the IP level, and slightly more on the Ethernet or ppp level (around 25 kbps). So, for 20 channels of 6.3kbps G723.1, you will need around 340 kbps on the IP level without silence suppression. For 20 channels with G729, you will need around 480 kbps. And of course, these calculations apply both ways (upstream & downstream). If you chose IAX instead of SIP, you will save lots of bandwidth if all (or most) of those 20 calls are directed to the same host. Best regards, Vlasis. /SNIP/ Above calculations by Vlasis appears accurate, based on our experience. These are the calcualtions many of our clients are experiencing. Seshu Kanuri -------------------------------------------------------- NOTICE: If received in error, please destroy and notify sender. Sender does not waive confidentiality or privilege, and use is prohibited.
Thanks for the input ... Kido ----- Original Message ----- From: "Kanuri, Seshu (Company IT)" <Seshu.Kanuri@morganstanley.com> To: "Asterisk Users Mailing List - Non-Commercial Discussion" <asterisk-users@lists.digium.com> Sent: Thursday, November 18, 2004 3:47 PM Subject: RE: [Asterisk-Users] internet bandwidth> /SNIP/ > Some corrections are needed: 6.3kbps of G723.1 will become around 17kbps > on the IP level without silence suppression because of the additional > overhead imposed by protocols like RTP, IP, etc . If you add the > Ethernet (or WAN protocol overhead) this will increase even more > (although slightly). > > Similarly, a voice stream of G729 at 8kbps will become around 24kbps on > the IP level, and slightly more on the Ethernet or ppp level (around 25 > kbps). > > So, for 20 channels of 6.3kbps G723.1, you will need around 340 kbps on > the IP level without silence suppression. > > For 20 channels with G729, you will need around 480 kbps. > > And of course, these calculations apply both ways (upstream & > downstream). > > If you chose IAX instead of SIP, you will save lots of bandwidth if all > (or most) of those 20 calls are directed to the same host. > > Best regards, > Vlasis. > > /SNIP/ > > Above calculations by Vlasis appears accurate, based on our experience. > These are the calcualtions many of our clients are experiencing. > > Seshu Kanuri > -------------------------------------------------------- > > NOTICE: If received in error, please destroy and notify sender. Senderdoes not waive confidentiality or privilege, and use is prohibited.> > _______________________________________________ > Asterisk-Users mailing list > Asterisk-Users@lists.digium.com > http://lists.digium.com/mailman/listinfo/asterisk-users > To UNSUBSCRIBE or update options visit: > http://lists.digium.com/mailman/listinfo/asterisk-users >
alexandre::aldeia digital
2004-Nov-19 06:13 UTC
[Asterisk-Users] internet bandwidth (comparing overhead)
Hi, I like to know why iLBC and GSM generate a 40-50kbps bandwidth.... Is very high, if compared with your calculations for other codecs(G723.1 / 17kbps and G729 / 24 Kbps). Alexandre Kanuri, Seshu (Company IT) wrote:> /SNIP/ > Some corrections are needed: 6.3kbps of G723.1 will become around 17kbps > on the IP level without silence suppression because of the additional > overhead imposed by protocols like RTP, IP, etc . If you add the > Ethernet (or WAN protocol overhead) this will increase even more > (although slightly). > > Similarly, a voice stream of G729 at 8kbps will become around 24kbps on > the IP level, and slightly more on the Ethernet or ppp level (around 25 > kbps).
For real life bandwidth tests : check the ppt on www.astertest.com Zoa. alexandre::aldeia digital wrote:> Hi, > > I like to know why iLBC and GSM generate a 40-50kbps bandwidth.... > Is very high, if compared with your calculations for other > codecs(G723.1 / 17kbps and G729 / 24 Kbps). > > > Alexandre > > Kanuri, Seshu (Company IT) wrote: > >> /SNIP/ >> Some corrections are needed: 6.3kbps of G723.1 will become around 17kbps >> on the IP level without silence suppression because of the additional >> overhead imposed by protocols like RTP, IP, etc . If you add the >> Ethernet (or WAN protocol overhead) this will increase even more >> (although slightly). >> >> Similarly, a voice stream of G729 at 8kbps will become around 24kbps on >> the IP level, and slightly more on the Ethernet or ppp level (around 25 >> kbps). > > _______________________________________________ > Asterisk-Users mailing list > Asterisk-Users@lists.digium.com > http://lists.digium.com/mailman/listinfo/asterisk-users > To UNSUBSCRIBE or update options visit: > http://lists.digium.com/mailman/listinfo/asterisk-users