[asterisk-users] GSM codec is a good choice ???

[Alejandro Cabrera Obed]

Do you think GSM codec has poor audio quality ???

Because I've made some tests among softphones connected from different
cities of my country and the audio was good to me.

Maybe GSM is a good choice.

On Tue, Feb 24, 2009 at 11:16 PM, David fire <ddfire at gmail.com> wrote:
> out there is a free for educational and no commercial G729 lib for asterisk
> you can use it to test in a non-comercial system.
> the digium lib is much better. if you have more than 30~60 phones
> transcoding inst a very good idea.
> i made my self a test on a core 2 duo 64 bits 2GB of ram a test transcoding
> more than 90 calls the sound quality was BAD not poor BAD.
>
> the digium transcoder is GREATE 0 cpu was gone for transcoding.
>
> keep this in mind.
>
> David
>
> 2009/2/24 Kristian Kielhofner <kristian.kielhofner at gmail.com>
>>
>> On Mon, Feb 23, 2009 at 6:59 PM, Alejandro Cabrera Obed
>> <aco1967 at gmail.com> wrote:
>> > Dear all, I have Asterisk 1.4 with SIP. I have a voicemail implemented
>> > with GSM sound files.
>> >
>> > The problem is I have IP phones Utopix HyperPhone 202 which support
>> > only G.729a/u and G.723.1 high/low, but not GSM.
>> >
>> > If I choose G.729A the "pass-throu" calls among users are OK, but
>> > Asterisk can't transcode GSM to G.729A in voicemail calls.
>> >
>> > My company doesn'y want to pay for a G.729 license, so I'm thinking to
>> > buy new IP phones with GSM support, so I have no problem with the
>> > voicemail system.
>> >
>> > Are the IP phone with GSM support a good choice for me ???
>> >
>> > (Maybe in the future I need to connect the Asterisk with the PSTN, GSM
>> > doesn't matter at this point ???)
>> >
>> > Really thanks,
>> >
>> > Alejandro
>> >
>>
>> Install the G.729 sound files and make app_voicemail record messages
>> (format=g729) in G729.  As long as you don't need meetme or a few
>> other apps that essentially require G.729 transcoding you don't need a
>> license.
>>
>> --
>> Kristian Kielhofner
>> http://blog.krisk.org
>> http://www.submityoursip.com
>> http://www.astlinux.org
>> http://www.star2star.com
>>
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>
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-- 
Alejandro Cabrera Obed
aco1967 at gmail.com
www.alejandrocabrera.com.ar