[Asterisk-Users] Re: Most common CODEC

[Michael Shuler]

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.

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

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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> > 
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