[Asterisk-Users] Re: Most common CODEC

[Rudakov Evgeniy]

On Tuesday 09 March 2004 10:43, Michael Shuler wrote:
> Yes, that's a "feature" of that box.  Every other IAD/MG is the other way
> around.  The 188 has no problems doing all on both ports.
>
its possible with asterisk convert from g723 to g729 ?

> ----------------------------------------
>
> Michael Shuler, C.E.O.
> BitWise Systems, Inc.
> 1301 W. Pioneer Parkway
> Peoria, IL 61615
> Office: (217) 585-0357
> Cell: (309) 657-6365
> Fax: (309) 213-3500
> E-Mail: mike at bwsys.net
> Customer Service: (877) 976-0711
>
> > -----Original Message-----
> > From: asterisk-users-admin at lists.digium.com
> > [mailto:asterisk-users-admin at lists.digium.com] On Behalf Of
> > evgeniy at riscom.net
> > Sent: Tuesday, March 09, 2004 2:24 AM
> > To: asterisk-users at lists.digium.com
> > Subject: [Asterisk-Users] Re: Most common CODEC
> >
> > Michael Shuler writes:
> > > G.729 is just about everywhere.  A lot of boxes use G.723
> >
> > (and/or G.726) too
> >
> > > but G.729 ends up with about the same quality but at a much
> >
> > lower bit rate.
> >
> > > Most inexpensive "hard" phones don't use G.723 because it
> >
> > takes a lot of CPU
> >
> > > power.  G.729 gets better results in the same or less CPU.
> >
> > We always try to
> >
> > > use phones supporting G.729, anything else is just gravy.
> >
> > If you can use
> >
> > but cisco ata 186 (2 channels)
> > can work with only single channel, when using g729 codec ...
> > and can use both channels with g723.
> >
> > > reinvites then you have no need for the G.729 unless you
> >
> > use the IVR, MOH,
> >
> > > etc. features of * where it is dishing out audio.  Even
> >
> > then you have to
> >
> > > consider if its worth it... After all if you are starting
> >
> > hosted VM company
> >
> > > using * then the G.729 is a must, but if you are just using
> >
> > to route calls
> >
> > > between 2 phones that can reinvite then the codec
> >
> > capabilities of * don't
> >
> > > matter.
> > >
> > > ----------------------------------------
> > >
> > > Michael Shuler, C.E.O.
> > > BitWise Systems, Inc.
> > > 1301 W. Pioneer Parkway
> > > Peoria, IL 61615
> > > Office: (217) 585-0357
> > > Cell: (309) 657-6365
> > > Fax: (309) 213-3500
> > > E-Mail: mike at bwsys.net
> > > Customer Service: (877) 976-0711
> > >
> > >> -----Original Message-----
> > >> From: asterisk-users-admin at lists.digium.com
> > >> [mailto:asterisk-users-admin at lists.digium.com] On Behalf Of
> > >> Carlos Chavez
> > >> Sent: Monday, March 08, 2004 11:11 PM
> > >> To: asterisk-users at lists.digium.com
> > >> Subject: Re: [Asterisk-Users] Most common CODEC
> > >>
> > >>
> > >> On Mon, 8 Mar 2004 23:45:44 -0500, Andrew Kohlsmith wrote
> > >>
> > >> > > G.729 is the best codec IMHO.  Goto
> > >> > > http://www.packetizer.com/iptel/bandcalc.html to get the
> > >>
> > >> real scoop.
> > >>
> > >> > IMO ILBC beats G.729 in terms of quality, especially in
> > >>
> > >> environments
> > >>
> > >> > where packet loss can occur.  It's about the same
> >
> > computationally-
> >
> > >> > speaking but it's also royalty-free.
> > >> >
> > >> > GSM is my second choice but it eats quite a bit more
> >
> > bandwidth in
> >
> > >> > comparsion.
> > >> >
> > >> > That packetizer link has no comparisons with any OSS
> >
> > codecs, which
> >
> > >> > is unfortunate because it seems to pass itself off as an
> > >> > authoritative source on bandwidth use in IP telephony.
> > >>
> > >>      I am not trying to start a codec war or find out which
> > >> is the best
> > >> protocol.  What I need to know is when I buy a Grandstream
> > >> phone, a Cisco
> > >> phone, a Sippura adaptor or any other hard phone, what codec
> > >> is usually
> > >> supported by all of them.  All of them obviously support
> > >> G.711 but that is not
> > >> the best for use when connecting through the Internet.  Is it
> > >> worthwhile to
> > >> buy G.729 licenses for Asterisk, or is there another codec
> > >> that is wildly
> > >> supported buy most phones?
> > >>
> > >> --
> > >> Carlos Chavez
> > >> Computer Engineer, CCNA
> > >> Corporativo Lacer S.A. de C.V.
> > >>
> > >> _______________________________________________
> > >> 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
> >
> > _______________________________________________
> > 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