<br><br><div class="gmail_quote">On Mon, Aug 23, 2010 at 11:29 AM, Hans Witvliet <span dir="ltr"><<a href="mailto:hwit@a-domani.nl">hwit@a-domani.nl</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
<div class="im">On Mon, 2010-08-23 at 02:10 -0400, Jeff LaCoursiere wrote:<br>
> On Mon, 23 Aug 2010, hadi motamedi wrote:<br>
><br>
> > Dear AllI need to offer dialup connection for my subscribers. When I put the codec on<br>
> > G.711 the dialup connection will be successful but for the G.723 & G.729 it is not. Can<br>
> > you please let me know what are stuffs do I need to have dialup connection when choosing<br>
> > G.723 & G.729 codecs?<br>
> > Thank you<br>
> ><br>
><br>
> You cannot. The compression algorithms in those codecs will squash any<br>
> kind of modem connection. Even over G.711u I am surprised you have much<br>
> success. Certainly nothing over 9600baud?<br>
><br>
<br>
</div>???<br>
<br>
If one can do voip over satelite with vpn either with compression or<br>
not, why should a simple dialupmodem not work?<br>
<br>
sure, re-recompression (in-affective as it will be) should only add<br>
unwanted latency, and should be disabled if possible, but when using the<br>
latest modems 48k or 56k bandwith should be obtainable.<br>
<br>
All i could think of, is that the modem connection should allready be<br>
up-and-running. One can shurely forget about call-triggerd modem<br>
connections, as it takes quite some time before those modem-connections<br>
are up-and-running, so any calling party will probably get<br>
"busy/unobtainable/out-of-order"...<br>
<font color="#888888"><br>
hw<br>
</font><div><div></div><div class="h5"><br>
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</div></div></blockquote></div>Excuse me, You mean the frequency spectrum of the V.90 modem can pass through an G.723.1/G.729a codec w/o much distortion? If so, can you please let me know why my dial up connection cannot get through when G.723.1/G.729a codec is selected?<div>
<br></div>