[Asterisk-Users] Re: Most common CODEC

Tue Mar 9 09:30:27 MST 2004

Yup

----------------------------------------

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 
> Rudakov Evgeniy
> Sent: Tuesday, March 09, 2004 3:28 AM
> To: asterisk-users at lists.digium.com
> Subject: Re: [Asterisk-Users] Re: Most common CODEC
> 
> 
> 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.
> > > >>
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