Hi Dave, I am 100% in agreement with you on the voice quality part as G729 is a lossy compression algorithm. It's like turning a tiff picture to jpeg and then back to tiff. The question is - what do you expect :)
Just a side question since you mentioned about your job status, how much can a Asterisk consultant make on average? I don't think they are very demanding in the market, but I could be wrong. Cheers, Richard ----- Original Message ----- From: Dave Donovan To: [email protected] Sent: Wednesday, March 14, 2007 9:27 AM Subject: Re: [on-asterisk] how to use G711 and G729 codec during the same call. Hold on. Your premise is completely false. On 3/14/07, Nishith Patel <[EMAIL PROTECTED]> wrote: I mean to say it should use G711 ulaw from Phone ( End Point ) to Asterisk server and when that call goes out from that internal network to out side world ( Internet ) it should use G729 codec. SO in that case I can get the advantage of G711 ulaw and G729 as well. Because G711 ulaw has excellent so sound quality as compare to G729 which is good in compression . So in that case I can save my bandwidth and at the same time I can get good sound quality. This configuration is completely possible as Liviu points out. Having said that, it will not have the effect you are describing. What you're talking about is like saying that you're going to convert a black and white picture to colour by photographing the black and white picture with a colour camera. Compressed codecs reduce the amount of information in the audio stream, it's lossy. This isn't like ZIP compression where you get back what you put in. What you will end up with is the compromised quality of G729 with the large bandwidth usage of ULaw. I saw your other post about Vicidial. If I could make a friendly suggestion: Since it seems you're looking at putting this to use in a business, and you seem to be having issues on a number of fronts, you might make better use of your time and money if you hired an Asterisk professional for even a day just to get things off the ground. A phone system that's been configured without adequate knowledge (whether it's an Asterisk system or otherwise) is not something that should be put into production in any business. (note: this isn't self promotion, I have a full time job and don't do Asterisk consulting any more) If you post to our business list, you will find many people in the Toronto area who are very qualified to help you. I hope this helps. Dave Donovan
