[Asterisk-Users] Codecs - Advantages

[Chris Shaw]

Hmmm, remember though that G.711u/a sends 64Kbit Frames, however it is not
actually 64Kbit/call... We're not doing Circuit-switching here, we're doing
packet switching. If you figure on IP overhead as well as the RTP
information and of course SIP messages, then you add the 64Kbit of G.711u/a
Payload you get around 80Kbit/sec Per user... that means on a Full T1 you
only get 19 simultaneous calls, not 24... and on an E1 you would get around
25 simultaneous calls, not 32...

And that's assuming that you have a very good SLA (or european equivalent)
and that your latency is VERY low... I hope to god you use QoS on your
router or your calls will sound like absolute crap... It's totally possible,
don't be scared off by what I said, I'm even using * on a cable connection
at home and it works just fine, you just need to do some preparation, it's a
big change especially for the end users of the system...

-Chris

----- Original Message -----
From: "brian" <brian at bkw.org>
To: <asterisk-users at lists.digium.com>
Sent: Monday, July 19, 2004 11:44 AM
Subject: RE: [Asterisk-Users] Codecs - Advantages


> If you have the bandwidth then use ulaw :)
>
> bkw
>
> > -----Original Message-----
> > From: asterisk-users-admin at lists.digium.com [mailto:asterisk-users-
> > admin at lists.digium.com] On Behalf Of matiaspinedo at ciudad.com.ar
> > Sent: Monday, July 19, 2004 12:44 PM
> > To: asterisk-users at lists.digium.com
> > Subject: [Asterisk-Users] Codecs - Advantages
> >
> > Hi,
> >  I'm planning to use a Asterisk with Digium E1 cards, I understand that
> > using a codec such as G.729 can be very CPU demanding. What are the real
> > advantages of using a codec such as G.729 ? Bandwidth only ? Using no
> > compression wouldn't increase the scalability of my asterisk PBX ? This
is
> > considering I have no bandwidth issues in my network.
> >
> > Thanks
> > __________________________________________________
> >
> > Todavía no tenés tu Ciudad Internet Mail? Obtenelo ahora! -
> > http://webmail.ciudad.com.ar
> >
> > Descargá Gratis el nuevo Internet Explorer 6.0, el mejor software para
> > actualizar tu PC.
> > http://www.ciudad.com.ar/ar/servicios/ie/
> >
> > _______________________________________________
> > Asterisk-Users mailing list
> > Asterisk-Users at 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
>
>
> _______________________________________________
> Asterisk-Users mailing list
> Asterisk-Users at 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