Thanks for the info. Pretty much what I figured. I would be VERY interested in hearing the prompts over a Digital T1 line instead of my analog port. If you could make a phone number available, I would appreciate it very much
Thanks Lee Goodman [EMAIL PROTECTED] ----- Original Message ----- From: "Steven Critchfield" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Wednesday, September 10, 2003 11:31 AM Subject: Re: [Asterisk-Users] Prompts and sound quality of the X100P card(FXO card) > On Wed, 2003-09-10 at 10:15, Lee Goodman wrote: > > Hi > > > > We are trying to get better sound quality out of the prompts on our Asterisk > > system. We had some new ones made by thevoice.digium.com and they are in WAV > > format instead of the default GSM format on the Asterisk server. The problem > > is, when you dial in to the server using the FXO card (X100P) you really > > can't tell the difference between the WAV prompt and the GSM prompt, > > however, if you listen to the prompts via a SIP phone you can hear a clear > > difference. Is the FXO card compressing the WAV file? Is there anyway to > > tweak the FXO card to make it sound better? > > Via SIP you are only doing 1 D/A conversion, and it is closest to the > speaker. At worst on the SIP connection, the only change to the prompt > is a codec change and that is unlikely. > > Via X100P, You have a D/A conversion to get it on the line, then at the > phone switch it is digitized and dropped off at the appropriate port to > go out to whatever phone you are using where there is another D/A > conversion then it goes to your phone. If it is a cell phone, then there > is compression on the cell link before it gets to you and the D/A > happens in the phone itself. Not to mention the probability of a mile or > more of analog copper in the link. > > So this isn't necessarily a problem with the X100P but in the underlying > technology. If you like, I could make a phone number available for you > to hear your prompts played over a PRI connection so you can see that it > is just an analog problem. > -- > Steven Critchfield <[EMAIL PROTECTED]> > > _______________________________________________ > Asterisk-Users mailing list > [EMAIL PROTECTED] > http://lists.digium.com/mailman/listinfo/asterisk-users _______________________________________________ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users
