From: Elias Chari (elias.chari@gmail.com)
Date: Tue Aug 15 2006 - 04:14:10 ART
Hi,
You are right, two sells will be required per voip packet with a total
bandwidth per call of 44.5kb/s. Needeles to say that a fair bit of b/w will
be wasted due to the fact that you need 2 cells per voip packet and of
course the atm overhead.
I haven't done the calculations but with RTP header compression you may go
down to 1 cell per voip packet which will reduce your overheads
considerably.
Rgds
Elias
On 8/15/06, Duane Dewitt <Duane.Dewitt@za.verizonbusiness.com> wrote:
>
> Hi All
>
> I am trying to do a capacity forecast for G729 VoIP running on ATM.
>
> My thinking is that the 60byte packet will have to be broken into two
> cells. So instead of having 50 packets a second at 60bytes (24Kbps) I
> need 50 packets a second at 106bytes (42Kbps). This works out to almost
> double that bandwidth.
>
> Is this logic correct or am I missing something?
>
> Regards
> Duane de Witt
> Technical Sales Consultant
> CCIE #15715
> --------------------------------------------
> Verizon Business SA
> Tel. 27 11 235 6543
> Cell. 27 83 445 2768
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html
This archive was generated by hypermail 2.1.4 : Fri Sep 01 2006 - 15:41:57 ART