On 15/8/03 18:57, "WipeOut ." <[EMAIL PROTECTED]> wrote: >> I was interested in getting the highest quality over a normal phone line >> because I want users to be able to record their messages at the highest >> quality. They do it not me hence my question about the highest quality >> codec. >> >> If for example they used VoIP software on a computer could they get higher >> quality than over a normal phone line? >> >> If they did use a normal phone line can I increase the quality of is this a >> limitation at the carriers end? >> >> Any help would be appreciated. >> >> Thanks. >> Fats. >> > > Using alaw or ulaw over VoIP will give you best quality you are going to get > over VoIP.. If your PSTN carrier is giving a bad quality line then you should > probably change carrier... :) > > Most prompts will be converted to GSM files anyway so that will be the quality > of the end result.. > > I wouldn't worry about it too much, just record some and take a listen, they > should be fine.. > > Later..
Thanks for the fast reply. I assume you mean that alaw or ulaw is what the carrier delivers. Because my customers use the phones they have I do not have control over the carrier they use, I just meant it to mean all carriers. As in what is the standard format they deliver in. I assume that I have no control over how they deliver but at the Asterisk end I wanted to ensure the highest quality recording. If I used a direct connection from one computer to asterisk could I increase the quality by using a different codec, assuming they have broadband access at their end. I have read that the g711 is the highest quality in the sample rate but was not sure if this would still work with Asterisk or if I should use G729 as it seems to be double the bandwidth sampling at between 8 and 12 kps whereas g711 seems to sample at 64kbs but that may flood the connection. Any ideas? Thanks Fats. _______________________________________________ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users
