Also your Disk subsystem speed.<br>having disk RAM , makes sense in your case.<br><br><div><span class="gmail_quote">On 9/10/07, <b class="gmail_sendername">Thomas Kenyon</b> <<a href="mailto:digium@sanguinarius.co.uk">
digium@sanguinarius.co.uk</a>> wrote:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">Barton Fisher wrote:<br>> Thanks, OK, a bit confused.... The cards are TE410P. I really don't
<br>> see how the set a codec for this, other than it might default to<br>> something in code like ulaw. Any clue on how to verify codec in use<br>> during a call?<br>><br>G.711ulaw and G.711alaw are the audio transmission methods used for
<br>ISDN. If you have a T1 line then the transmission method is G.711ulaw.<br><br>I've been told that if you play a ulaw signal down an alaw line (T1<br>signal down E1) then at the other end the voice sounds a bit like a
<br>dalek. (Iit's very hard to do this with asterisk since it automatically<br>transcodes between endpoints).<br><br>The lack of a performance hit is quite striking when you have a<br>recording playing back as a native format rather than being transcoded.
<br>(well, it's quite striking when you have thousands of them running<br>simultaneously).<br><br>> Bart<br>><br>> Steve Totaro wrote:<br>>> Michiel van Baak wrote:<br>>><br>>>> On 10:28, Sun 09 Sep 07, Barton Fisher wrote:
<br>>>><br>>>>> I have 4 TDM T1's going in to a IVR system. The IVR messages are<br>>>>> recorded .wav format - The system appears to crap out at about 40<br>>>>> calls - Would using GSM or some other format help save CPU cycles?
<br>>>>> Using 1.2, Dual Xeon and 2GB ram<br>>>>><br>>>> depends on what codec the T1 is using.<br>>>> Best to transcode the ivr sounds to the same codec to<br>>>> prevent on-the-fly transcoding by asterisk.
<br>>>><br>>>><br>>> The answer is going to ulaw or alaw depending where you live. T1<br>>> should most likely be using ulaw so make everything ulaw, end to end.<br>>><br>>> Thanks,
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