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Integrating Voice and Data Networks
Scott Keagy
Cisco Press
Published October 2000
ISBN 1578701961
MJ wrote:
>
> Thanks Sasa,
>
> Well this will help me to calculate. Where you got all these stats ? are
> they in the same book that you have reffered, can u tell me the Author and
> publication also.
>
> Can we have RTP compression at 2 Internet routers if they are connected Via
> Internet ?
> Moreover normally delay is 500 msec or something on internet, and if you
> have ever done a voice chat on msn or yahoo when we are on dialup, things
> work perfectly. So that made me think that VoIP should work perfectly on
> Internet based leased lines.
>
> Mukul
>
> ""Sasa Milic"" wrote in message
> [EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> > Mukul,
> >
> > usually, one voice packet is 20 bytes. Add to that 40 bytes for
> > RTP+UDP+IP headers. So, for 8 Kbps voice stream, you would have
> > to add 16 Kbps for overhead. That is total 24 Kbps. RTP header
> > compression could shrink that to 11-12 Kbps, but it is possible
> > to use it only on PtoP links, between two routers running RTP
> > compression.
> >
> > End-to-end delay (delay budget) should be less than 150 ms,
> > but then, it all depends, it could work will more, depending
> > on users' expectations.
> >
> > BTW, great book for VoIP is "Integrating Voice and Data Networks".
> >
> > Sasa
> >
> >
> > MJ wrote:
> > >
> > > Moreover I second question was :
> > >
> > > What should be bandwidth to run one channel, they say 8K, so does
> > > that mean that on 64K leased line I can have 8 Ports working without
> > > any problem
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