Alejandro Cabrera Obed
2009-Feb-23 23:59 UTC
[asterisk-users] GSM codec is a good choice ???
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
On Mon, 23 Feb 2009, Alejandro Cabrera Obed 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.g723 is supported by Asterisk. I've never used it, but it shows up with the "show codecs" command.> 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.Because you don't have a g729 codec?> 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.You may want to rethink this. G.729 licenses are only $10 per channel. Can you replace the instrument and retrain your users for $10 each?> (Maybe in the future I need to connect the Asterisk with the PSTN, GSM > doesn't matter at this point ???)That would depend on how you interface to the PSTN. Thanks in advance, ------------------------------------------------------------------------ Steve Edwards sedwards at sedwards.com Voice: +1-760-468-3867 PST Newline Fax: +1-760-731-3000
Alejandro Cabrera Obed schrieb:> 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.http://www.utopixnetworks.com.ar/ip_phones_hiperphone_202.php According to the web site the Utopix HiperPhone 202 and 112 support G.711a/u (alaw/ulaw) as well. So why not use G.711a for everything? Philipp Kempgen -- AMOOCON 2009, May 4-5, Rostock / Germany -> http://www.amoocon.de Asterisk: http://the-asterisk-book.com - http://das-asterisk-buch.de AMOOMA GmbH - Bachstr. 126 - 56566 Neuwied -> http://www.amooma.de Gesch?ftsf?hrer: Stefan Wintermeyer, Handelsregister: Neuwied B14998 --
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